Doctor (Doctor Who)
Encyclopedia
The Doctor is the central character in the long-running BBC
BBC
The British Broadcasting Corporation is a British public service broadcaster. Its headquarters is at Broadcasting House in the City of Westminster, London. It is the largest broadcaster in the world, with about 23,000 staff...

 television science-fiction
Science fiction on television
Science fiction first appeared on a television program during the Golden Age of Science Fiction. Special effects and other production techniques allow creators to present a living visual image of an imaginary world not limited by the constraints of reality; this makes television an excellent medium...

 series Doctor Who
Doctor Who
Doctor Who is a British science fiction television programme produced by the BBC. The programme depicts the adventures of a time-travelling humanoid alien known as the Doctor who explores the universe in a sentient time machine called the TARDIS that flies through time and space, whose exterior...

, and has also featured in two cinema feature films, a vast range of spin-off novels, audio dramas and comic strips connected to the series.

To date, eleven actors have played the role in the television series, with continuity being maintained by the ability of the character's species to regenerate
Regeneration (Doctor Who)
Regeneration, in the British science fiction television series Doctor Who, is a biological ability exhibited by Time Lords, a race of fictional humanoids originating on the planet Gallifrey. This process allows a Time Lord who is old or mortally wounded to undergo a transformation into a new...

. Several other actors have played the character on stage and film, in audio dramas, and in occasional special episodes of the series. The character's enduring popularity led the Daily Telegraph to dub him "Britain's favourite alien". The Doctor, in his eleventh incarnation
Eleventh Doctor
The Eleventh Doctor is the eleventh incarnation of the protagonist of the BBC television science-fiction series Doctor Who. Matt Smith plays this incarnation, replacing David Tennant's Tenth Doctor in the 2010 episode "The End of Time, Part Two"...

, is currently played by Matt Smith
Matt Smith
Matt Smith may refer to:*Matt Smith , American actor/producer whose screen name is Z.D. Smith*Matt Smith , English actor, known for playing the Eleventh Doctor in the British television series Doctor Who...

, who took over the role from David Tennant
David Tennant
David Tennant is a Scottish actor. In addition to his work in theatre, including a widely praised Hamlet, Tennant is best known for his role as the tenth incarnation of the Doctor in Doctor Who, along with the title role in the 2005 TV serial Casanova and as Barty Crouch, Jr...

 at the end of the special The End of Time
The End of Time
The End of Time: The Next Revolution in Our Understanding of the Universe, also sold with the alternate subtitle The Next Revolution in Physics, is a 1999 science book in which the author Julian Barbour argues that time exists merely as an illusion.-Auto-biography:The book begins by describing how...

, broadcast on 1 January 2010.

Background

The Doctor is a Time Lord
Time Lord
The Time Lords are an ancient extraterrestrial race and civilization of humanoids in the British science fiction television series Doctor Who, of which the series' eponymous protagonist, the Doctor, is a member...

, an extraterrestrial
Extraterrestrial life in popular culture
In popular cultures, "extraterrestrials" are life forms — especially intelligent life forms— that are of extraterrestrial origin .-Historical ideas:-Pre-modern:...

 from the planet Gallifrey
Gallifrey
Gallifrey is a fictional planet in the long-running British science fiction television series Doctor Who and is the homeworld of the Doctor and the Time Lords...

, who travels through time and space
Space
Space is the boundless, three-dimensional extent in which objects and events occur and have relative position and direction. Physical space is often conceived in three linear dimensions, although modern physicists usually consider it, with time, to be part of a boundless four-dimensional continuum...

 in an internally vast time machine
Time travel
Time travel is the concept of moving between different points in time in a manner analogous to moving between different points in space. Time travel could hypothetically involve moving backward in time to a moment earlier than the starting point, or forward to the future of that point without the...

 called the TARDIS
TARDIS
The TARDISGenerally, TARDIS is written in all upper case letters—this convention was popularised by the Target novelisations of the 1970s...

 (Time And Relative Dimension(s) In Space) which appears relatively small when seen from the outside and almost always appears like a 1950s British police box.
The Doctor explores the universe at random, using his extensive knowledge of science, technology and history to avert whatever crisis he encounters. The imprecise nature of his travels is initially attributed to the age and unreliability of the TARDIS's navigation system. However, the 1969 serial The War Games
The War Games
The War Games is a serial in the British science fiction television series Doctor Who, which originally aired in ten weekly parts from 19 April to 21 June 1969. It was the last regular appearance of Patrick Troughton as the Second Doctor, and of Wendy Padbury and Frazer Hines as companions Zoe...

reveals that the Doctor actually stole the TARDIS, and subsequent stories such as Planet of the Dead
Planet of the Dead
"Planet of the Dead" is the first 2009 special of the British science fiction television series Doctor Who that was simultaneously broadcast on BBC One and BBC HD on 11 April 2009. It was the second of five special episodes broadcast throughout 2009 and early 2010, which served as lead actor...

, The Big Bang
The Big Bang (Doctor Who)
"The Big Bang" is the 13th and final episode in the fifth series of British science fiction television series Doctor Who. It is the second part of a two-part season finale started with "The Pandorica Opens", at the end of which The Doctor is trapped, the TARDIS destroyed, and Amy Pond has been shot...

and The Doctor's Wife
The Doctor's Wife (Doctor Who)
"The Doctor's Wife" is the fourth episode of the sixth series of the British science fiction television series Doctor Who, which was broadcast on 14 May 2011 in the United Kingdom, as well as in the United States...

have incorporated this. He was presumably unfamiliar with its systems but was able to operate it correctly until his exile when the Time Lords wiped it from his memory. The Doctor initially had the manual for operating the TARDIS but destroyed it because he "disagreed with it". After his trial and exile to twentieth century Earth, the Doctor still visits other planets on missions from the Time Lords who pilot the TARDIS to precise locations for him. After his exile is lifted, the Doctor returns to his travels and demonstrates the ability to reach a destination of his own choosing more often than not. In the 2011 episode "The Doctor's Wife
The Doctor's Wife (Doctor Who)
"The Doctor's Wife" is the fourth episode of the sixth series of the British science fiction television series Doctor Who, which was broadcast on 14 May 2011 in the United Kingdom, as well as in the United States...

", the Doctor tells the TARDIS (whose matrix, or soul, was temporarily transferred to the character Idris) that she has never been very reliable in taking him where he wanted to go. The TARDIS explains that she always took the Doctor where he needed to be. In "Journey's End
Journey's End (Doctor Who)
"Journey's End" is the thirteenth episode of the fourth series of British science fiction television series Doctor Who first broadcast on BBC One on 5 July 2008. It is the second episode of a two-part crossover story featuring the characters of spin-off shows Torchwood and The Sarah Jane...

", the Doctor states that the reason for the previous bumpy navigation was that the TARDIS is meant to have six pilots, but in "The Time of Angels
The Time of Angels
"The Time of Angels" is the fourth episode in the fifth series of British science fiction television series Doctor Who, first broadcast on 24 April 2010 on BBC One. It is the first episode of a two-part story written by showrunner Steven Moffat and directed by Adam Smith; the second episode was...

" River Song demonstrates superior piloting skills and says the Doctor pilots the TARDIS "with the brakes on" (hence the classic noise). The Doctor generally travels with one or more companions
Companion (Doctor Who)
In the long-running BBC television science fiction programme Doctor Who and related works, the term "companion" refers to a character who travels with, and shares the adventures of the Doctor. In most Doctor Who stories, the primary companion acts as both deuteragonist and audience surrogate...

. Most of these make a conscious decision to travel with him, but others, especially early in the series, are accidental passengers or kidnap victims.

The Doctor's childhood

The Doctor's childhood is little described. The classic series often refers to his time at the academy and that he belongs to the Prydonian chapter of Time Lords, who are notoriously devious. His teachers included Borusa who would eventually become President of the High Council and other pupils included The Master
Master (Doctor Who)
The Master is a recurring character in the British science fiction television series Doctor Who. He is a renegade Time Lord and the archenemy of the Doctor....

 and possibly the Rani
Rani (Doctor Who)
The Rani is a fictional character in the British science fiction television series Doctor Who. She was played by Kate O'Mara. The word "Rani" means "queen" in the Urdu and Hindi languages and "The Rani" follows the naming convention for other renegade timelords, "The Doctor," "The Monk," "The War...

. The Eighth Doctor
Eighth Doctor
The Eighth Doctor is the eighth incarnation of the protagonist of the long-running BBC television science-fiction series Doctor Who. He was portrayed by Paul McGann...

, in the 1996 television movie is the first to mention his parents or childhood before this, when he tells Grace Holloway
Grace Holloway
Dr. Grace Holloway is a fictional character played by Daphne Ashbrook in the 1996 television movie Doctor Who, a continuation of the long-running British science fiction television series Doctor Who...

 that he remembers watching a meteorite shower from a grassy hill top in the company of his father.

During "The Girl in the Fireplace
The Girl in the Fireplace
"The Girl in the Fireplace" is the fourth episode of the second series of the British science fiction television series Doctor Who. It was first broadcast on 6 May 2006, and is the only episode in the 2006 series written by Steven Moffat...

", Madame de Pompadour
Madame de Pompadour
Jeanne Antoinette Poisson, Marquise de Pompadour, also known as Madame de Pompadour was a member of the French court, and was the official chief mistress of Louis XV from 1745 to her death.-Biography:...

 "saw" memories of his childhood during a telepathic session between the two and commented that it was "so lonely." However, when asked if he has a brother in "Smith and Jones
Smith and Jones (Doctor Who)
"Smith and Jones" is the first episode of the third series of the British science fiction television series Doctor Who. It was first broadcast on BBC One on 31 March 2007. It sees the debut of Freema Agyeman as new companion Martha Jones...

", the Doctor simply replied "not any more". In the same episode, he mentioned "playing with Röntgen
Röntgen
The roentgen is a unit of measurement for exposure to ionizing radiation , and is named after the German physicist Wilhelm Röntgen...

 blocks in the nursery." He was also once good friends with the Master
Master (Doctor Who)
The Master is a recurring character in the British science fiction television series Doctor Who. He is a renegade Time Lord and the archenemy of the Doctor....

.

In "The Time Monster
The Time Monster
The Time Monster is a serial in the British science fiction television series Doctor Who, which was first broadcast in six weekly parts from 20 May to 24 June 1972.- Synopsis :...

", the Doctor says he grew up in a house on the side of a mountain, and talks about a hermit who lived under a tree behind the house and inspired the Doctor when he was depressed. He is later reunited with this former mentor, now on earth posing as the abbot K’anpo Rinpoche, in "Planet of the Spiders
Planet of the Spiders
Planet of the Spiders is a serial in the British science fiction television series Doctor Who, which was first broadcast in six weekly parts from May 4 to June 8, 1974. It was Jon Pertwee's last serial as the Doctor and marks the first, uncredited appearance of Tom Baker in the role. It also marks...

".

In the BBC novel The Nightmare of Black Island
The Nightmare of Black Island
The Nightmare of Black Island is a BBC Books original novel written by Mike Tucker and based on the long running science fiction television series Doctor Who. It was published on September 21, 2006, alongside The Art of Destruction and The Price of Paradise...

the Doctor stated his favourite childhood story was Moxx In Socks. In "Mission to Magnus
Mission to Magnus
Mission to Magnus is a story originally written to be part of the unfilmed 1986 season of Doctor Who. It was written by Philip Martin, who had previously written the television stories Vengeance on Varos and Mindwarp....

", the Doctor tells how at the Academy he was bullied by another Time Lord named Anzor. In "Master
Master (Doctor Who audio)
Master is a Big Finish Productions audio drama based on the long-running British science fiction television series Doctor Who. It forms a trilogy with Omega and Davros to celebrate the 40th anniversary of the show...

", the Doctor tells how he killed a bully who tormented him and the Master
Master (Doctor Who)
The Master is a recurring character in the British science fiction television series Doctor Who. He is a renegade Time Lord and the archenemy of the Doctor....

. It's possible this could be Anzor as well.

In "The Sound of Drums
The Sound of Drums
"The Sound of Drums" is an episode of the British science fiction television series Doctor Who. It was broadcast on BBC One on 23 June 2007, and is the twelfth episode of Series 3 of the revived Doctor Who series...

" (2007), the Doctor describes a Time Lord Academy initiation ceremony where, at the age of eight, Time Lord children are made to look into the Untempered Schism, a gap in space and time where they could view the time vortex. Some are inspired, some go mad (as he suggests happened to his nemesis, the Master), and some run away. When asked which he was, he replies, "Oh, the ones that ran away—I never stopped!"

In "The End of Time
The End of Time
The End of Time: The Next Revolution in Our Understanding of the Universe, also sold with the alternate subtitle The Next Revolution in Physics, is a 1999 science book in which the author Julian Barbour argues that time exists merely as an illusion.-Auto-biography:The book begins by describing how...

", the Master describes his and the Doctor's experiences together, saying, "I had estates. Do you remember my father's land back home? Pastures of red grass, stretching far across the slopes of Mount Perdition. We used to run across those fields all days, calling up at the sky."

The most complete glimpses into the Doctor's childhood occurs in the Virgin New Adventures
Virgin New Adventures
The Virgin New Adventures were a series of novels from Virgin Publishing based on the British science-fiction television series Doctor Who...

 novel Lungbarrow
Lungbarrow
Lungbarrow is an original novel written by Marc Platt and based on the long-running British science fiction television series Doctor Who...

however, as with all non-televised Doctor Who media, the canonicity of this story is unclear. Lungbarrow portrays the Doctor as being one of 45 cousins grown from the House genetic loom as an adult. (In New Adventures continuity, the Time Lords are not capable of sexual reproduction and survive through genetic looms producing a quota of cousins.) The Head of the Family Ordinal General Quences knew that the Doctor had a special destiny and built him a robot tutor called Badger and planned the Doctor's eventual rise to the post of President. His fellow cousins resented the Doctor's position and he spent most of his childhood being bullied by his cousin Glospin and was equally brutally treated by the Housekeeper Satthralope. Eventually he rebelled against Quences's grand plans and was exiled from the family, stealing a TARDIS and leaving Gallifrey. This is seemingly contradicted by "The Sound of Drums", showing the Master as a child. The BBC books novel The Infinity Doctors
The Infinity Doctors
The Infinity Doctors is a BBC Books original novel written by Lance Parkin and based on the long-running British science fiction television series Doctor Who...

,
for example, states that the Doctor was born from the loom, but it adds that he was also the son of a Gallifreyan explorer and a human mother.

Family

References to the Doctor's family are rare in the series. During the first two seasons he travelled with his granddaughter, Susan Foreman
Susan Foreman
Susan Foreman is a fictional character in the British science fiction television series Doctor Who. The granddaughter and original companion of the First Doctor, she was played by actress Carole Ann Ford from 1963 to 1964, in the show's first season and the first two stories of the second season...

, and as noted above he apparently once had a brother. Although fans have raised the possibility that Susan may not be the Doctor's granddaughter, it is never hinted in the stories she features (or was it ever the intention of the production team) that this is the case.

During his second incarnation
Second Doctor
The Second Doctor is the second incarnation of the protagonist of the long-running BBC television science-fiction series Doctor Who. He was portrayed by character actor Patrick Troughton....

 when asked about his family, the Doctor says his memories of them are still alive when he wants them to be and otherwise they sleep in his mind (The Tomb of the Cybermen
The Tomb of the Cybermen
The Tomb of the Cybermen is a serial in the British science fiction television series Doctor Who that originally aired in four weekly parts from September 2 to September 23, 1967 and is the earliest serial starring Patrick Troughton as the Second Doctor to exist in its entirety...

). In The Time Monster
The Time Monster
The Time Monster is a serial in the British science fiction television series Doctor Who, which was first broadcast in six weekly parts from 20 May to 24 June 1972.- Synopsis :...

,
the third Doctor states that as a little boy he lived in a house perched halfway up a mountain. In The Curse of Fenric
The Curse of Fenric
The Curse of Fenric is a serial in the British science fiction television series Doctor Who, which was first broadcast in four weekly parts from 25 October to 15 November 1989...

,
when asked if he has any family, the Seventh Doctor
Seventh Doctor
The Seventh Doctor is the seventh incarnation of the protagonist of the long-running BBC television science-fiction series Doctor Who. He was portrayed by the actor Sylvester McCoy....

 replies that he does not know, indirectly hinting that an unspecified fate may have befallen them.

In "Fear Her
Fear Her
"Fear Her" is an episode of the British science fiction television series Doctor Who. It was first broadcast on 24 June 2006.The episode takes part on the day of the opening ceremony of the 2012 Summer Olympics in London, almost exclusively on a fictitious cul-de-sac named after the British athlete...

", the Tenth Doctor mentions to Rose that he "was a dad once", but then quickly changes the subject; he makes the same admission to Donna in "The Doctor's Daughter
The Doctor's Daughter
"The Doctor's Daughter" is the sixth episode of the fourth series of British science fiction television series Doctor Who. It was broadcast on BBC One on 10 May 2008.- Synopsis :...

" when she assumes that he has "Dad-shock". He later clarifies in the same episode that he had been a father but that was lost to him during the Time War
Time War (Doctor Who)
The Time War, more specifically called The Last Great Time War, is a conflict within the fictional universe of the long-running British science fiction television series Doctor Who...

. In "The Empty Child
The Empty Child
"The Empty Child" is an episode in the British science fiction television series Doctor Who, which was first broadcast on 21 May 2005. It is the first of a two-part story. The concluding episode, "The Doctor Dances", was broadcast on 28 May...

", Dr. Constantine says to him, "Before this war began, I was a father and a grandfather. Now I'm neither. But I'm still a doctor." The Doctor's reply is, "Yeah. I know the feeling." When asked by Amy Pond
Amy Pond
Amelia Jessica 'Amy' Pond is a fictional character portrayed by Karen Gillan in the long-running British science fiction television series Doctor Who...

 in "The Beast Below
The Beast Below
"The Beast Below" is the second episode of the fifth series of the British science fiction television series Doctor Who. It was written by showrunner Steven Moffat and broadcast on BBC One and BBC HD on 10 April 2010....

" if he is a parent, the Doctor simply changes the subject. When the Doctor gifts Amy and Rory's newborn daughter with an ancient bassinet in "A Good Man Goes to War
A Good Man Goes to War
"A Good Man Goes to War" is the seventh episode of the sixth series of the British science fiction television series Doctor Who, and was first broadcast on BBC One on 4 June 2011...

", Amy again asks if he has children. The Doctor does not answer the question though he does tell Amy that the bassinet was his as a baby. In "Night Terrors
Night Terrors (Doctor Who)
"Night Terrors" is the ninth episode of the sixth series of the British science fiction television series Doctor Who, and was first broadcast on BBC One and BBC America on 3 September 2011.-Synopsis:...

", the Doctor attempts to help amuse a little boy by talking about fairy tales he used to enjoy and also uses his sonic screwdriver to make the boy's toys move. The Doctor mumbles that he is "a bit rusty at this."

He mentions his father in the 1996 Doctor Who telefilm, where he also indicates his mother was human (see "Continuity curiosities" below).

The Doctor also might have had a brother. In "Smith and Jones
Smith and Jones (Doctor Who)
"Smith and Jones" is the first episode of the third series of the British science fiction television series Doctor Who. It was first broadcast on BBC One on 31 March 2007. It sees the debut of Freema Agyeman as new companion Martha Jones...

", the Tenth Doctor is asked, "Have you got a brother?" by Martha Jones and the Doctor replies, "No. Not any more, just me".

In "The Doctor's Daughter
The Doctor's Daughter
"The Doctor's Daughter" is the sixth episode of the fourth series of British science fiction television series Doctor Who. It was broadcast on BBC One on 10 May 2008.- Synopsis :...

", the Doctor had his genetic information stolen and used to create a female soldier and comes to refer to the result, a young woman eventually named Jenny
Jenny (Doctor Who)
Jenny, portrayed by Georgia Moffett, is a fictional character in the long-running British science fiction television series Doctor Who. She first appeared in the episode "The Doctor's Daughter", originally broadcast 10 May 2008...

 (played by Georgia Moffett
Georgia Moffett
Georgia Elizabeth Moffett is a British actress. Moffett was born in West London, the daughter of actors Peter Davison and Sandra Dickinson....

, real world daughter of Peter Davison
Peter Davison
Peter Davison is a British actor, best known for his roles as Tristan Farnon in the television version of James Herriot's All Creatures Great and Small and the fifth incarnation of the Doctor in Doctor Who, which he played from 1982 to 1984.-Early life:Davison was born Peter Moffett in Streatham,...

 and fiancee of David Tennant
David Tennant
David Tennant is a Scottish actor. In addition to his work in theatre, including a widely praised Hamlet, Tennant is best known for his role as the tenth incarnation of the Doctor in Doctor Who, along with the title role in the 2005 TV serial Casanova and as Barty Crouch, Jr...

), as his daughter; she in turn knows him as her father. At the end of the episode, she is resurrected by terraforming technology and steals a rocket, intending to become an adventurer like her father. It is unknown if she will ever return.

By the end of the series "Journey's End
Journey's End (Doctor Who)
"Journey's End" is the thirteenth episode of the fourth series of British science fiction television series Doctor Who first broadcast on BBC One on 5 July 2008. It is the second episode of a two-part crossover story featuring the characters of spin-off shows Torchwood and The Sarah Jane...

" a half-human Doctor is created from his severed hand, when the Tenth Doctor transfers his regeneration energy into the hand to prevent a full regeneration of his own body. Both Doctors share the same memories up until that point but the half-human Doctor also has elements of Donna Noble's personality and her DNA as a result of her touching the hand, causing the mass regeneration to occur. The "Meta-Crisis" Doctor has only one heart and cannot regenerate.

In the episode "Blink
Blink (Doctor Who)
"Blink" is the 10th episode of the third series of the new production of the British science fiction television series Doctor Who. It was first broadcast on 9 June 2007, and is the only episode in the 2007 series written by Steven Moffat; the episode is based on a previous short story written by...

", the Doctor states that he never was good at weddings, especially his own. According to both his greeting speech to Ood Sigma in "The End of Time
The End of Time
The End of Time: The Next Revolution in Our Understanding of the Universe, also sold with the alternate subtitle The Next Revolution in Physics, is a 1999 science book in which the author Julian Barbour argues that time exists merely as an illusion.-Auto-biography:The book begins by describing how...

" and his breakdown to Dorium Maldovar in "The Wedding of River Song
The Wedding of River Song
"The Wedding of River Song" is the thirteenth and final episode of the sixth series of the British science fiction television series Doctor Who, and was first broadcast on BBC One, BBC America and Space on 1 October 2011.-Plot:...

", sometime between "The Waters of Mars
The Waters of Mars
"The Waters of Mars" is the second 2009 special of British science fiction television series Doctor Who, broadcast on BBC One on 15 November 2009. It aired on BBC America on 19 December 2009 and was released on DVD and Blu-ray in the UK on 11 January 2010 and in the US on 2 February 2010...

" and the beginning of "The End of Time
The End of Time
The End of Time: The Next Revolution in Our Understanding of the Universe, also sold with the alternate subtitle The Next Revolution in Physics, is a 1999 science book in which the author Julian Barbour argues that time exists merely as an illusion.-Auto-biography:The book begins by describing how...

", the Doctor also married the former "Good Queen Bess". During his speech he states "Her nickname is no longer . . . " before being interrupted, and notes on the experience "That was a mistake." The possibility exists that the Doctor could just be having a laugh here; however, the story persisted, as her distant successor Liz Ten ("The Beast Below
The Beast Below
"The Beast Below" is the second episode of the fifth series of the British science fiction television series Doctor Who. It was written by showrunner Steven Moffat and broadcast on BBC One and BBC HD on 10 April 2010....

") comments, "And so much for the Virgin Queen, you bad, bad boy!" In "A Christmas Carol", the Doctor finds himself engaged to Marilyn Monroe but later claims the wedding did not take place in a legitimate chapel. When River Song
River Song (Doctor Who)
River Song is a fictional character played primarily by Alex Kingston in the British science-fiction series Doctor Who. River Song was introduced to the series as an experienced future companion of series protagonist the Doctor, an alien Time Lord who travels through time in his TARDIS...

 shows up in "Time of Angels", Amy asks both the Doctor and River if they are married to each other. The Doctor initially says yes but that is in his future but her past while River's answer seems affirmative but ambiguous. In "The Big Bang
The Big Bang (Doctor Who)
"The Big Bang" is the 13th and final episode in the fifth series of British science fiction television series Doctor Who. It is the second part of a two-part season finale started with "The Pandorica Opens", at the end of which The Doctor is trapped, the TARDIS destroyed, and Amy Pond has been shot...

", the Doctor asks River Song if she is married; she asks if he's asking and the Doctor says he is. Her answer leaves the Doctor puzzled, wondering if she had thought that he had proposed and if she had just accepted. She replies with another enigmatic, "Yes."

In "The End of Time
The End of Time
The End of Time: The Next Revolution in Our Understanding of the Universe, also sold with the alternate subtitle The Next Revolution in Physics, is a 1999 science book in which the author Julian Barbour argues that time exists merely as an illusion.-Auto-biography:The book begins by describing how...

", a mysterious individual, referred to only in the credits as "The Woman", appears unexpectedly to Wilfred Mott
Wilfred Mott
Wilfred "Wilf" Mott is a recurring fictional character in the British science fiction television series Doctor Who, played by Bernard Cribbins. He is the maternal grandfather of the Tenth Doctor's companion Donna Noble, and father of character Sylvia Noble...

 throughout both episodes. She is later revealed to be a dissident Time Lady, who opposed the Time Lord High Council's plan to escape the Time War. When she reveals her face to the Doctor, his reaction indicates that he recognises her. Julie Gardner, in the episode's commentary, states that while some have speculated that the Time Lady is the Doctor's mother, neither she nor Russell T. Davies are willing to comment on her identity. When later asked by Wilfred who she was, the Doctor evades answering the question, making their connection unclear. In Doctor Who: The Writer's Tale – The Final Chapter, Russell T Davies states that he created the character to be the Doctor's mother and this is what actress Claire Bloom
Claire Bloom
Claire Bloom is an English film and stage actress.-Early life:Bloom was born in the North London suburb of Finchley, the daughter of Elizabeth and Edward Max Blume, who worked in sales...

 was told when she was cast.

In "The Wedding of River Song
The Wedding of River Song
"The Wedding of River Song" is the thirteenth and final episode of the sixth series of the British science fiction television series Doctor Who, and was first broadcast on BBC One, BBC America and Space on 1 October 2011.-Plot:...

" the Doctor marries River Song, making her his wife. This also makes Amy Pond and Rory Williams his in-laws as well as both the Ponds and Williams' families now being related to him.

Spin-off family

In a number of spin-off material, a number of individuals related to the Doctor have made appearances which don't appear in the television series.

In the First and Second Doctor comics and annuals, the Doctor travelled with two of his grandchildren named John and Gillian.

In the novel Legacy of the Daleks
Legacy of the Daleks
Legacy of the Daleks is an original novel written by John Peel and based on the long-running British science fiction television series Doctor Who...

, it is revealed that Susan and her husband David adopt three children who they name David Campbell Junior, Ian and Barbara; named after David himself, Ian Chesterton and Barbara Wright respectively.

In the novel Father Time
Father Time (Doctor Who)
Father Time is a BBC Books original novel written by Lance Parkin and based on the long-running British science fiction television series Doctor Who. It features the Eighth Doctor and introduces the Doctor's adopted daughter Miranda.-External links:*...

,
the Eighth Doctor, during his hundred-year-long exile on Earth, found an orphaned Time Lord girl named Miranda
Miranda (Doctor Who)
Miranda is a fictional character from the Eighth Doctor Adventures novel series published by BBC Books; based upon the British science fiction television series, Doctor Who. She was, for a time, the adopted daughter and companion of the Eighth Doctor...

 whom he adopted and raised till she was 16. Later she returned to the Doctor along with her daughter Zezanne in the novel Sometime Never...
Sometime Never...
Sometime Never... is a BBC Books original novel written by Justin Richards and based on the long-running British science fiction television series Doctor Who...

. She was also the central character in a three-issue comic book series published by Comeuppance Comics in 2003. Author Lance Parkin, who devised the character, has hinted that her real father is actually a future incarnation of the Doctor which, if so, would make Zezanne the Doctor's granddaughter.

In the beginning

The character of the Doctor was created by the BBC's Head of Drama Sydney Newman
Sydney Newman
Sydney Cecil Newman, OC was a Canadian film and television producer, who played a pioneering role in British television drama from the late 1950s to the late 1960s...

. The first format document for the series that was to become Doctor Who – then provisionally titled The Troubleshooters – was written up in March 1963 by C. E. Webber
C. E. Webber
Cecil Edwin Webber was a British television writer and playwright. He is best remembered for his contribution to the creation of the famous science-fiction series Doctor Who while working as a staff writer for the BBC in the early 1960s...

, a BBC staff writer who had been brought in to help develop the project. Webber's document contained a main character described as "The maturer man, 35–40, with some 'character twist.'" However, Newman was not keen on this idea and—along with several other changes to Webber's initial format—created an alternative lead character named "Dr. Who:" a crotchety older man piloting a stolen time machine, on the run from his own far future world. No written record of Newman's conveyance of these ideas—believed to have taken place in April 1963—exists, and the character of "Dr Who" first begins appearing in existing documentation from May of that year.

The character was first portrayed by William Hartnell
William Hartnell
William Henry Hartnell was an English actor. During 1963-66, he was the first actor to play the Doctor in the long-running BBC science fiction television series Doctor Who.-Early life:...

 in 1963. When, after three years, Hartnell left the series due to ill health, the role was handed over to respected character actor Patrick Troughton
Patrick Troughton
Patrick George Troughton was an English actor most widely known for his roles in fantasy, science fiction and horror films, particularly in his role as the second incarnation of the Doctor in the long-running British science-fiction television series Doctor Who, which he played from 1966 to 1969,...

. To date, official television productions have depicted eleven distinct incarnations of the Doctor (due to Hartnell's death in 1975, actor Richard Hurndall
Richard Hurndall
Richard Gibbon Hurndall was an English actor.-BBC radio:Hurndall was born in Darlington and he attended Claremont Preparatory School, Darlington and Scarborough College, before training as an actor at the Royal Academy of Dramatic Arts. He then appeared in several plays at Stratford-upon-Avon...

 substituted in his role as the First Doctor
First Doctor
The First Doctor is the initial incarnation of the protagonist of the long-running BBC television science-fiction series Doctor Who. He was portrayed by the actor William Hartnell from 1963 to 1966. Hartnell reprised the role in the tenth anniversary story The Three Doctors in 1973 - albeit in a...

 in 1983's The Five Doctors
The Five Doctors
The Five Doctors is a special feature-length episode of the British science fiction television series Doctor Who, produced in celebration of the programme's twentieth anniversary. It had its world premiere in the United States, on the Chicago PBS station WTTW and various other PBS member stations...

,
resulting in a technical total of twelve actors). Of those, the longest-lasting on-screen incarnation is the Fourth Doctor
Fourth Doctor
The Fourth Doctor is the fourth incarnation of the protagonist of the long-running BBC British television science-fiction series Doctor Who....

, as played by Tom Baker
Tom Baker
Thomas Stewart "Tom" Baker is a British actor. He is best known for playing the fourth incarnation of the Doctor in the science fiction television series Doctor Who, a role he played from 1974 to 1981.-Early life:...

. Currently, the Eleventh Doctor
Eleventh Doctor
The Eleventh Doctor is the eleventh incarnation of the protagonist of the BBC television science-fiction series Doctor Who. Matt Smith plays this incarnation, replacing David Tennant's Tenth Doctor in the 2010 episode "The End of Time, Part Two"...

 is portrayed by Matt Smith.

At the programme's beginning, nothing at all is known of the Doctor: not even his name, the actual form of which remains a mystery. In the very first serial, An Unearthly Child
An Unearthly Child
The serial that became An Unearthly Child was originally commissioned from writer Anthony Coburn in June 1963, when it was intended to run as the second Doctor Who serial. At this stage, it was planned that the series would open with a serial entitled The Giants, to be written by BBC staff...

,
two teachers from Coal Hill School
Coal Hill School
Coal Hill School is a fictional school in the television series Doctor Who. It is a comprehensive school located in the Shoreditch area of London....

 in London, Barbara Wright
Barbara Wright (Doctor Who)
Barbara Wright is a fictional character in the British science fiction television series Doctor Who and a companion of the First Doctor. She was one of the programme's very first regulars and appeared in the bulk of its first two seasons from 1963–65, played by Jacqueline Hill. In the film version...

 and Ian Chesterton
Ian Chesterton
Ian Chesterton is a fictional character in the British science fiction television series Doctor Who and a companion of the First Doctor. He was played in the series by William Russell, and was one of the members of the programme's very first regular cast, appearing in the bulk of the first two...

, become intrigued by one of their students, Susan Foreman
Susan Foreman
Susan Foreman is a fictional character in the British science fiction television series Doctor Who. The granddaughter and original companion of the First Doctor, she was played by actress Carole Ann Ford from 1963 to 1964, in the show's first season and the first two stories of the second season...

, who exhibits high intelligence and unusually advanced knowledge. Trailing her to a junkyard at 76 Totter's Lane, they encounter a strange old man and hear Susan's voice coming from inside what appears to be a police box. Pushing their way inside, the two find that the exterior is actually camouflage for the dimensionally transcendental interior of the TARDIS
TARDIS
The TARDISGenerally, TARDIS is written in all upper case letters—this convention was popularised by the Target novelisations of the 1970s...

. The old man, whom Susan calls "Grandfather", subsequently kidnaps Barbara and Ian to prevent them from telling anyone about the existence of the ship, taking them on an adventure in time and space.

Becoming "involved"

The Doctor is an adventurer and scientist with a strong moral sense. He usually solves problems with his wits rather than with force, and is more likely to wield a sonic screwdriver
Sonic screwdriver
The sonic screwdriver is a fictional tool in the British science fiction television series Doctor Who and its spinoffs. It is a multifunctional tool used by The Doctor. Its most common function is that of a lockpick, but can be used to perform other operations such as performing medical scans,...

 than a gun; although he has been seen to use weapons as a last resort. According to the alien villain Chedaki in the episode The Android Invasion
The Android Invasion
The Android Invasion is a serial in the British science fiction television series Doctor Who, which was first broadcast in four weekly parts from 22 November to 13 December 1975. It marks the last appearance of UNIT Character Sergeant Benton...

,
"his long association with libertarian
Libertarianism
Libertarianism, in the strictest sense, is the political philosophy that holds individual liberty as the basic moral principle of society. In the broadest sense, it is any political philosophy which approximates this view...

 causes" shows that "his entire history is one of opposition to conquest."

As a time traveller, the Doctor has been present at, or directly involved in, countless major historical events on the planet Earth
Earth
Earth is the third planet from the Sun, and the densest and fifth-largest of the eight planets in the Solar System. It is also the largest of the Solar System's four terrestrial planets...

 and elsewhere—sometimes more than once. In the 2005 series premiere, "Rose
Rose (Doctor Who)
"Rose" is the first episode of Series One of the British science-fiction television series Doctor Who. Written by show runner Russell T Davies and directed by Keith Boak, the episode was first broadcast on 26 March 2005....

", it is revealed that the Ninth Doctor
Ninth Doctor
The Ninth Doctor is the ninth incarnation of the protagonist of the long-running BBC television science-fiction series Doctor Who. He is played by Christopher Eccleston....

 was instrumental in preventing a family from boarding the Titanic prior to her fateful voyage. In "The End of the World
The End of the World (Doctor Who)
"The End of the World" is the second episode of Series One of the British science-fiction television series Doctor Who. Written by show runner Russell T Davies and directed by Euros Lyn, the episode was first broadcast on 2 April 2005....

", the Doctor recalls having been on board and surviving the Titanic's sinking to find himself "clinging to an iceberg". The Fourth Doctor
Fourth Doctor
The Fourth Doctor is the fourth incarnation of the protagonist of the long-running BBC British television science-fiction series Doctor Who....

 also mentioned this event in Robot
Robot (Doctor Who)
Robot is a serial in the British science fiction television series Doctor Who, which was first broadcast in four weekly parts from 28 December 1974 to 18 January 1975...

and The Invasion of Time
The Invasion of Time
The Invasion of Time is a serial in the British science fiction television series Doctor Who, which was first broadcast in six weekly parts from 4 February to 11 March 1978...

, where he insists that the sinking was not his fault; the Seventh Doctor
Seventh Doctor
The Seventh Doctor is the seventh incarnation of the protagonist of the long-running BBC television science-fiction series Doctor Who. He was portrayed by the actor Sylvester McCoy....

 became involved in the sinking when tracking an alien entity in the novel The Left-Handed Hummingbird
The Left-Handed Hummingbird
The Left-Handed Hummingbird is an original novel written by Kate Orman and based on the long-running British science fiction television series Doctor Who. It features the Seventh Doctor, Ace and Bernice. A prelude to the novel, also written by Orman, appeared in Doctor Who Magazine #207...

, but this may not be canonical.

Many historical figures on Earth have also encountered the Doctor. In City of Death
City of Death
-Pre-production:Writer David Fisher had contributed two scripts to Doctor Whos sixteenth season – The Stones of Blood and The Androids of Tara – and was asked by producer Graham Williams for further story ideas...

it is revealed that the Doctor has met Leonardo da Vinci
Leonardo da Vinci
Leonardo di ser Piero da Vinci was an Italian Renaissance polymath: painter, sculptor, architect, musician, scientist, mathematician, engineer, inventor, anatomist, geologist, cartographer, botanist and writer whose genius, perhaps more than that of any other figure, epitomized the Renaissance...

 and William Shakespeare
William Shakespeare
William Shakespeare was an English poet and playwright, widely regarded as the greatest writer in the English language and the world's pre-eminent dramatist. He is often called England's national poet and the "Bard of Avon"...

 (whom he met again, later from his perspective but earlier from Shakespeare's, in "The Shakespeare Code
The Shakespeare Code
"The Shakespeare Code" is an episode of the British science fiction television series Doctor Who. It was broadcast on BBC One on 7 April 2007, and is the second episode of Series 3 of the revived Doctor Who series. According to the BARB figures this episode was seen by 7.23 million viewers and was...

" as well a younger Shakespeare who he saved in his Eighth incarnation
Eighth Doctor
The Eighth Doctor is the eighth incarnation of the protagonist of the long-running BBC television science-fiction series Doctor Who. He was portrayed by Paul McGann...

 in "The Time of the Daleks
The Time of the Daleks
The Time of the Daleks is a Big Finish Productions audio drama based on the long-running British science fiction television series Doctor Who...

"), and that the first folio of the latter's Hamlet
Hamlet
The Tragical History of Hamlet, Prince of Denmark, or more simply Hamlet, is a tragedy by William Shakespeare, believed to have been written between 1599 and 1601...

was transcribed by the Doctor himself (City of Death). He has also met a young H. G. Wells
H. G. Wells
Herbert George Wells was an English author, now best known for his work in the science fiction genre. He was also a prolific writer in many other genres, including contemporary novels, history, politics and social commentary, even writing text books and rules for war games...

 (Timelash
Timelash
Timelash is a serial in the British science fiction television series Doctor Who, which was first broadcast in two weekly parts from 9–16 March 1985.-Synopsis:...

), Albert Einstein
Albert Einstein
Albert Einstein was a German-born theoretical physicist who developed the theory of general relativity, effecting a revolution in physics. For this achievement, Einstein is often regarded as the father of modern physics and one of the most prolific intellects in human history...

 (Time and the Rani
Time and the Rani
Time and the Rani is a serial in the British science fiction television series Doctor Who, which was first broadcast in four weekly parts from 7 September to 28 September 1987. This story was the first to feature Sylvester McCoy as the Doctor. It also features the last appearance of the Sixth...

), Mao Tse Tung
Mao Zedong
Mao Zedong, also transliterated as Mao Tse-tung , and commonly referred to as Chairman Mao , was a Chinese Communist revolutionary, guerrilla warfare strategist, Marxist political philosopher, and leader of the Chinese Revolution...

 (Referenced in The Mind of Evil
The Mind of Evil
The Mind of Evil is a serial in the British science fiction television series Doctor Who, which was first broadcast in six weekly parts from 30 January to 6 March 1971.-Plot:...

), Richard the Lionheart (The Crusade
The Crusade (Doctor Who)
The Crusade is a serial in the British science fiction television series Doctor Who, which was first broadcast in four weekly parts from March 27 to April 17, 1965. The story is set in Palestine, near Jerusalem, during the Third Crusade.-Plot:...

), Wyatt Earp
Wyatt Earp
Wyatt Berry Stapp Earp was an American gambler, investor, and law enforcement officer who served in several Western frontier towns. He was also at different times a farmer, teamster, bouncer, saloon-keeper, miner and boxing referee. However, he was never a drover or cowboy. He is most well known...

 (The Gunfighters
The Gunfighters
The Gunfighters is a serial in the British science fiction television series Doctor Who, set in 19th Century America on the days leading up to the famous Gunfight at the O.K. Corral...

), and Marco Polo
Marco Polo
Marco Polo was a Venetian merchant traveler from the Venetian Republic whose travels are recorded in Il Milione, a book which did much to introduce Europeans to Central Asia and China. He learned about trading whilst his father and uncle, Niccolò and Maffeo, travelled through Asia and apparently...

 (Marco Polo
Marco Polo (Doctor Who)
-CD and DVD releases:*In 2003, a three-CD set of the audio soundtrack was released, as part of Doctor Who's 40th anniversary. This CD set is unique in containing a map of Cathay as represented during the period of the Doctor's visit to China, and also explaining historical inaccuracies...

). More recently, the Doctor has shared adventures with Charles Dickens
Charles Dickens
Charles John Huffam Dickens was an English novelist, generally considered the greatest of the Victorian period. Dickens enjoyed a wider popularity and fame than had any previous author during his lifetime, and he remains popular, having been responsible for some of English literature's most iconic...

 ("The Unquiet Dead
The Unquiet Dead
"The Unquiet Dead" is an episode in the British science-fiction television series Doctor Who that was first broadcast on 9 April 2005 and is the first episode of the revival to be set in the past. In Victorian Cardiff, the dead are walking, and creatures made of gas are on the loose...

"), Ben Franklin (Referenced to in "Smith and Jones
Smith and Jones (Doctor Who)
"Smith and Jones" is the first episode of the third series of the British science fiction television series Doctor Who. It was first broadcast on BBC One on 31 March 2007. It sees the debut of Freema Agyeman as new companion Martha Jones...

"), Agatha Christie
Agatha Christie
Dame Agatha Christie DBE was a British crime writer of novels, short stories, and plays. She also wrote romances under the name Mary Westmacott, but she is best remembered for her 66 detective novels and 14 short story collections , and her successful West End plays.According to...

 ("The Unicorn and the Wasp
The Unicorn and the Wasp
"The Unicorn and the Wasp" is the 7th episode in the revised fourth series of the British science fiction television series Doctor Who, which was aired by BBC One on 17 May 2008 at 19:00. Perhaps due to its later broadcast, it received an overnight audience rating of 7.7 million, making it the...

"), Queen Victoria
Victoria of the United Kingdom
Victoria was the monarch of the United Kingdom of Great Britain and Ireland from 20 June 1837 until her death. From 1 May 1876, she used the additional title of Empress of India....

 ("Tooth and Claw
Tooth and Claw (Doctor Who)
"Tooth and Claw" is the second episode in the second series of the British science fiction television series Doctor Who and was first broadcast on 22 April 2006. In 1879 Scotland, the Doctor and Rose meet Queen Victoria...

"), Elizabeth I ("The Shakespeare Code
The Shakespeare Code
"The Shakespeare Code" is an episode of the British science fiction television series Doctor Who. It was broadcast on BBC One on 7 April 2007, and is the second episode of Series 3 of the revived Doctor Who series. According to the BARB figures this episode was seen by 7.23 million viewers and was...

" and an untelevised adventure between The Waters of Mars
The Waters of Mars
"The Waters of Mars" is the second 2009 special of British science fiction television series Doctor Who, broadcast on BBC One on 15 November 2009. It aired on BBC America on 19 December 2009 and was released on DVD and Blu-ray in the UK on 11 January 2010 and in the US on 2 February 2010...

and The End of Time
The End of Time
The End of Time: The Next Revolution in Our Understanding of the Universe, also sold with the alternate subtitle The Next Revolution in Physics, is a 1999 science book in which the author Julian Barbour argues that time exists merely as an illusion.-Auto-biography:The book begins by describing how...

), Madame de Pompadour
Madame de Pompadour
Jeanne Antoinette Poisson, Marquise de Pompadour, also known as Madame de Pompadour was a member of the French court, and was the official chief mistress of Louis XV from 1745 to her death.-Biography:...

 ("The Girl in the Fireplace
The Girl in the Fireplace
"The Girl in the Fireplace" is the fourth episode of the second series of the British science fiction television series Doctor Who. It was first broadcast on 6 May 2006, and is the only episode in the 2006 series written by Steven Moffat...

"), Winston Churchill
Winston Churchill
Sir Winston Leonard Spencer-Churchill, was a predominantly Conservative British politician and statesman known for his leadership of the United Kingdom during the Second World War. He is widely regarded as one of the greatest wartime leaders of the century and served as Prime Minister twice...

 ("Victory of the Daleks
Victory of the Daleks
"Victory of the Daleks" is the third episode in the fifth series of British science fiction television series Doctor Who. It is written by Mark Gatiss and first broadcast on BBC One on 17 April 2010....

", also appeared in the novels Players
Players (Doctor Who)
Players is a BBC Books original novel written by Terrance Dicks and based on the long-running British science fiction television series Doctor Who. It features the Sixth Doctor and Peri meeting Winston Churchill during the Boer War and prior to the abdication of the would-be king Edward VIII...

and The Shadow in the Glass
The Shadow in the Glass
The Shadow in the Glass is a BBC Books original novel written by Stephen Cole and Justin Richards and based on the long-running British science fiction television series Doctor Who...

, Shadow also seeing the Doctor meeting Adolf Hitler
Adolf Hitler
Adolf Hitler was an Austrian-born German politician and the leader of the National Socialist German Workers Party , commonly referred to as the Nazi Party). He was Chancellor of Germany from 1933 to 1945, and head of state from 1934 to 1945...

) and Vincent van Gogh
Vincent van Gogh
Vincent Willem van Gogh , and used Brabant dialect in his writing; it is therefore likely that he himself pronounced his name with a Brabant accent: , with a voiced V and palatalized G and gh. In France, where much of his work was produced, it is...

 ("Vincent and the Doctor
Vincent and the Doctor
"Vincent and the Doctor" is the 10th episode in the fifth series of British science fiction television series Doctor Who, which was first broadcast on 5 June 2010...

"). A photograph seen in the 2005 series shows that the Ninth Doctor
Ninth Doctor
The Ninth Doctor is the ninth incarnation of the protagonist of the long-running BBC television science-fiction series Doctor Who. He is played by Christopher Eccleston....

 witnessed the death
John F. Kennedy assassination
John Fitzgerald Kennedy, the thirty-fifth President of the United States, was assassinated at 12:30 p.m. Central Standard Time on Friday, November 22, 1963, in Dealey Plaza, Dallas, Texas...

 of US president John F. Kennedy
John F. Kennedy
John Fitzgerald "Jack" Kennedy , often referred to by his initials JFK, was the 35th President of the United States, serving from 1961 until his assassination in 1963....

. The Fourth Doctor explains in "The Ark in Space
The Ark in Space
The Ark in Space is a serial in the British science fiction television series Doctor Who, which was first broadcast in four weekly parts from 25 January to 15 February 1975.-Plot:The TARDIS materialises in a darkened room on board the station...

" that his signature scarf was knitted for him by Madame Nostradamus
Nostradamus
Michel de Nostredame , usually Latinised to Nostradamus, was a French apothecary and reputed seer who published collections of prophecies that have since become famous worldwide. He is best known for his book Les Propheties , the first edition of which appeared in 1555...

, while the Tenth Doctor
Tenth Doctor
The Tenth Doctor is the tenth incarnation of the protagonist of the long-running BBC television science-fiction series Doctor Who. He is played by David Tennant, who appears in three series, as well as eight specials...

 in "Gridlock
Gridlock (Doctor Who)
"Gridlock" is the third episode from the third series of the revived British science fiction television series Doctor Who which aired on 14 April 2007. The Doctor returns to a much grittier New Earth with Martha Jones and meets the Face of Boe one final time. But as New New York becomes a deadly...

" says that Janis Joplin
Janis Joplin
Janis Lyn Joplin was an American singer, songwriter, painter, dancer and music arranger. She rose to prominence in the late 1960s as the lead singer of Big Brother and the Holding Company and later as a solo artist with her backing groups, The Kozmic Blues Band and The Full Tilt Boogie Band...

 gave him his brown overcoat and in "Smith and Jones" he tells Martha Jones that the Suffragette leader Emmeline Pankhurst
Emmeline Pankhurst
Emmeline Pankhurst was a British political activist and leader of the British suffragette movement which helped women win the right to vote...

 stole his laser spanner when they met. The Eleventh Doctor
Eleventh Doctor
The Eleventh Doctor is the eleventh incarnation of the protagonist of the BBC television science-fiction series Doctor Who. Matt Smith plays this incarnation, replacing David Tennant's Tenth Doctor in the 2010 episode "The End of Time, Part Two"...

 mentions in "The Time of Angels
The Time of Angels
"The Time of Angels" is the fourth episode in the fifth series of British science fiction television series Doctor Who, first broadcast on 24 April 2010 on BBC One. It is the first episode of a two-part story written by showrunner Steven Moffat and directed by Adam Smith; the second episode was...

" that he is on Virginia Woolf
Virginia Woolf
Adeline Virginia Woolf was an English author, essayist, publisher, and writer of short stories, regarded as one of the foremost modernist literary figures of the twentieth century....

's bowling team.

It is this penchant for becoming "involved" with the universe—in direct violation of official Time Lord policy—that has caused the Doctor to be labelled a renegade by the Time Lords. (His defence of his involvement, first made in The War Games
The War Games
The War Games is a serial in the British science fiction television series Doctor Who, which originally aired in ten weekly parts from 19 April to 21 June 1969. It was the last regular appearance of Patrick Troughton as the Second Doctor, and of Wendy Padbury and Frazer Hines as companions Zoe...

,
notes and maintains that whilst most of his fellow Time Lords have been content merely to observe the evil in the Universe, he has been actively fighting against it.) Most of the time, however, his actions are tolerated, especially given that he has saved not just Gallifrey
Gallifrey
Gallifrey is a fictional planet in the long-running British science fiction television series Doctor Who and is the homeworld of the Doctor and the Time Lords...

 but also the universe several times over. The Time Lords are also partial to sending him on missions when deniability or expendability is needed, implied to have begun after his capture during "The War Games
The War Games
The War Games is a serial in the British science fiction television series Doctor Who, which originally aired in ten weekly parts from 19 April to 21 June 1969. It was the last regular appearance of Patrick Troughton as the Second Doctor, and of Wendy Padbury and Frazer Hines as companions Zoe...

"- see Season 6B
Season 6B
Season 6B is a fan theory related to the long-running British science fiction television series Doctor Who. It constitutes a hypothetical series of adventures undertaken by the Second Doctor between his final regular appearance in season 6 and the Third Doctor's debut in season 7...

- and being witnessed further in later stories, the Time Lords directing the Doctor and/or the TARDIS to specific locations in "Colony in Space", "The Curse of Peladon
The Curse of Peladon
The Curse of Peladon is a serial in the British science fiction television series Doctor Who, which was first broadcast in four weekly parts from 29 January to 19 February 1972.-Synopsis:...

", "The Mutants", "Genesis of the Daleks
Genesis of the Daleks
Genesis of the Daleks is a serial in the British science fiction television series Doctor Who that was originally broadcast in six weekly parts from 8 March to 12 April 1975. It marks the first appearance of Davros, the creator of the Daleks.-Plot:...

", "The Brain of Morbius
The Brain of Morbius
The Brain of Morbius is a serial in the British science fiction television series Doctor Who, which was first broadcast in four weekly parts from 3 January to 24 January 1976...

", and "Attack of the Cybermen
Attack of the Cybermen
Attack of the Cybermen is a serial in the British science fiction television series Doctor Who, which was first broadcast in two weekly parts from 5 January to 12 January 1985. It opened Season 22 of the series...

". The Doctor's standing in Time Lord society has waxed and waned over the years, from being a hunted man to being appointed Lord President of the High Council. He does not assume the office for very long, fleeing Gallifrey after his appointment rather than accept the limitations on his freedom that the role would place on him ("The Five Doctors
The Five Doctors
The Five Doctors is a special feature-length episode of the British science fiction television series Doctor Who, produced in celebration of the programme's twentieth anniversary. It had its world premiere in the United States, on the Chicago PBS station WTTW and various other PBS member stations...

"), and is eventually removed from it in his absence ("The Trial of a Time Lord
The Trial of a Time Lord
The Trial of a Time Lord is a fourteen-part British science fiction serial of the long running BBC series Doctor Who. The serial, produced as the twenty-third season of the Doctor Who television series, aired in weekly episodes from 6 September to 6 December 1986...

").

Physiology

Although Time Lords resemble humans, their physiology differs in some key respects. For example, like other members of his race, the Doctor has two heart
Heart
The heart is a myogenic muscular organ found in all animals with a circulatory system , that is responsible for pumping blood throughout the blood vessels by repeated, rhythmic contractions...

s (binary vascular system), a "respiratory bypass system" that allows him to go without air, an internal body temperature of 15–16 degrees Celsius (60 degrees Fahrenheit) and he occasionally exhibits a super-human level of stamina, and the ability to absorb, withstand, and expel large amounts of certain types of radiation (the Tenth Doctor stated they used to play with Röntgen
Röntgen
The roentgen is a unit of measurement for exposure to ionizing radiation , and is named after the German physicist Wilhelm Röntgen...

 bricks in the nursery, after absorbing the radiation from an x-ray of significantly magnified power). This ability would seem to have limitations which have yet to be fully explained, as he is harmed by radiation in The Daleks
The Daleks
The Daleks is a serial in the British science fiction television series Doctor Who, which was first broadcast in seven weekly parts from 21 December 1963 to 1 February 1964...

, Planet of the Spiders
Planet of the Spiders
Planet of the Spiders is a serial in the British science fiction television series Doctor Who, which was first broadcast in six weekly parts from May 4 to June 8, 1974. It was Jon Pertwee's last serial as the Doctor and marks the first, uncredited appearance of Tom Baker in the role. It also marks...

, and The End of Time
The End of Time
The End of Time: The Next Revolution in Our Understanding of the Universe, also sold with the alternate subtitle The Next Revolution in Physics, is a 1999 science book in which the author Julian Barbour argues that time exists merely as an illusion.-Auto-biography:The book begins by describing how...

. Additionally, he's withstood exposure to electricity deadly enough to kill a human with minimal damage (Terror of the Zygons
Terror of the Zygons
Terror of the Zygons is a serial in the British science fiction television series Doctor Who, which was first broadcast in four weekly parts from 30 August to 20 September 1975...

, Genesis of the Daleks
Genesis of the Daleks
Genesis of the Daleks is a serial in the British science fiction television series Doctor Who that was originally broadcast in six weekly parts from 8 March to 12 April 1975. It marks the first appearance of Davros, the creator of the Daleks.-Plot:...

, Aliens of London
Aliens of London
"Aliens of London" is the fourth episode of the first series of the British science fiction television show Doctor Who that was first broadcast on 16 April 2005. The Doctor takes Rose back to 21st century London, just in time to witness a spaceship crashing into the River Thames, triggering a...

, The Christmas Invasion
The Christmas Invasion
"The Christmas Invasion" is a 60-minute special episode of the British science fiction television series Doctor Who. It is Christmas, but there is little cause for celebration as planet Earth is invaded by aliens known as the Sycorax...

, Evolution of the Daleks
Evolution of the Daleks
"Evolution of the Daleks" is an episode of the British science fiction television series Doctor Who. It was first broadcast on BBC One on 28 April 2007, and is the fifth episode of Series 3 of the revived Doctor Who series. It is the conclusion of the two-part story begun in "Daleks in...

, spin-off audio Spare Parts). Certain stories also imply that he is somewhat resistant to cold temperatures. To counter extreme trauma, such as exposure to the poisonous fungus in The Seeds of Death
The Seeds of Death
The Seeds of Death is a serial in the British science fiction television series Doctor Who, which originally aired in six weekly parts from 25 January to 1 March 1969...

and after being shot in Spearhead from Space
Spearhead from Space
Spearhead from Space is a serial in the British science fiction television series Doctor Who, which was first broadcast in four weekly parts from 3 January to 24 January 1970. The serial opened Series 7 of the show and was the first to be produced in colour. The serial introduced Jon Pertwee as the...

, he can go into a self induced coma until he recovers.

Additionally, he has shown a resistance to temporal effects and has demonstrated some telepathic ability, both the ability to mentally connect to other incarnations of himself he encountered (The Five Doctors
The Five Doctors
The Five Doctors is a special feature-length episode of the British science fiction television series Doctor Who, produced in celebration of the programme's twentieth anniversary. It had its world premiere in the United States, on the Chicago PBS station WTTW and various other PBS member stations...

), and an ability to enter into the memories of other individuals, similar to the Vulcan mind meld portrayed in Star Trek
Star Trek
Star Trek is an American science fiction entertainment franchise created by Gene Roddenberry. The core of Star Trek is its six television series: The Original Series, The Animated Series, The Next Generation, Deep Space Nine, Voyager, and Enterprise...

("The Girl in the Fireplace
The Girl in the Fireplace
"The Girl in the Fireplace" is the fourth episode of the second series of the British science fiction television series Doctor Who. It was first broadcast on 6 May 2006, and is the only episode in the 2006 series written by Steven Moffat...

"). He can apparently reverse this process, sharing his memory with another, as seen most recently in The Big Bang
The Big Bang (Doctor Who)
"The Big Bang" is the 13th and final episode in the fifth series of British science fiction television series Doctor Who. It is the second part of a two-part season finale started with "The Pandorica Opens", at the end of which The Doctor is trapped, the TARDIS destroyed, and Amy Pond has been shot...

. Some humans can also enter the Doctor's memories after he enters theirs, as demonstrated by Madame de Pompadour (much to the Doctor's surprise) in "The Girl in the Fireplace", when she explains, "A door, once opened, may be entered from either direction." In "The Fires of Pompeii
The Fires of Pompeii
"The Fires of Pompeii" is the second episode of the fourth series of the British science fiction television series Doctor Who. It was broadcast on BBC One on 12 April 2008....

" the Doctor reveals that he is able to perceive the fabric of time, discerning "fixed points" and "points in flux"- moments when history must remain as it was originally versus moments when he can change or influence the original course of events-, as well as all past, present and possible future events. It is revealed in the episode "The Unicorn and the Wasp
The Unicorn and the Wasp
"The Unicorn and the Wasp" is the 7th episode in the revised fourth series of the British science fiction television series Doctor Who, which was aired by BBC One on 17 May 2008 at 19:00. Perhaps due to its later broadcast, it received an overnight audience rating of 7.7 million, making it the...

" that if he has the right vitamins and minerals in the right order he can stop himself dying from a dose of cyanide.

The Doctor also exhibits some weaknesses uncommon to humans. For example, according to The Mind of Evil
The Mind of Evil
The Mind of Evil is a serial in the British science fiction television series Doctor Who, which was first broadcast in six weekly parts from 30 January to 6 March 1971.-Plot:...

(1971), a tablet of aspirin
Aspirin
Aspirin , also known as acetylsalicylic acid , is a salicylate drug, often used as an analgesic to relieve minor aches and pains, as an antipyretic to reduce fever, and as an anti-inflammatory medication. It was discovered by Arthur Eichengrun, a chemist with the German company Bayer...

 could kill him. In the Eighth Doctor Adventures
Eighth Doctor Adventures
The Eighth Doctor Adventures are a series of spin off novels based on the long running BBC science fiction television series Doctor Who and published under the BBC Books imprint. 73 books were published overall...

 novel The Adventuress of Henrietta Street
The Adventuress of Henrietta Street
The Adventuress of Henrietta Street is a BBC Books original novel written by Lawrence Miles and based on the long-running British science fiction television series Doctor Who. It features the Eighth Doctor, Fitz and Anji....

the Doctor lost some of his biological advantages over humans when his second heart was surgically removed when it appeared to be poisoning him, resulting in him losing the ability to metabolise drugs in his system and his respiratory bypass system, but these are restored to him when he begins to grow a new heart after his old one 'dies' (Camera Obscura
Camera Obscura (Doctor Who)
Camera Obscura is a BBC Books original novel written by Lloyd Rose and based on the long-running British science fiction television series Doctor Who. It features the Eighth Doctor, Fitz and Anji.-Continuity:...

). Events from the novels may or may not be canonical.

In his final serial
The War Games
The War Games is a serial in the British science fiction television series Doctor Who, which originally aired in ten weekly parts from 19 April to 21 June 1969. It was the last regular appearance of Patrick Troughton as the Second Doctor, and of Wendy Padbury and Frazer Hines as companions Zoe...

, the Second Doctor
Second Doctor
The Second Doctor is the second incarnation of the protagonist of the long-running BBC television science-fiction series Doctor Who. He was portrayed by character actor Patrick Troughton....

 states that Time Lords can live forever, "barring accidents." When "accidents" do occur, Time Lords can usually regenerate
Regeneration (Doctor Who)
Regeneration, in the British science fiction television series Doctor Who, is a biological ability exhibited by Time Lords, a race of fictional humanoids originating on the planet Gallifrey. This process allows a Time Lord who is old or mortally wounded to undergo a transformation into a new...

 into a new body. However, it is stated in The Deadly Assassin
The Deadly Assassin
The Deadly Assassin is a serial in the British science fiction television series Doctor Who, which was first broadcast in four weekly parts from 30 October to 20 November 1976...

that Time Lords can only regenerate a total of twelve times, giving a theoretical final total of thirteen incarnations. It may be possible to exceed this: in The Five Doctors
The Five Doctors
The Five Doctors is a special feature-length episode of the British science fiction television series Doctor Who, produced in celebration of the programme's twentieth anniversary. It had its world premiere in the United States, on the Chicago PBS station WTTW and various other PBS member stations...

the Time Lords offer the Master, who is inhabiting a Trakenite body, a regeneration cycle as reward for his help and cooperation, and at some point during the Time War they resurrected him, with his new body having at least one regeneration of its own. Regeneration is apparently optional, as in "Last of the Time Lords
Last of the Time Lords
"Last of the Time Lords" is an episode of the British science fiction television series Doctor Who. It was broadcast on BBC One on 30 June 2007, and is the thirteenth and final episode of Series 3 of the revived Doctor Who series...

" the Master refuses to regenerate despite the Tenth Doctor's pleading. In addition, there are ways of killing a Time Lord that do not permit regeneration; for example, more than once it has been implied that stopping both the Doctor's hearts simultaneously would accomplish this. In the events of "The Impossible Astronaut
The Impossible Astronaut
"The Impossible Astronaut" is the first episode of the sixth series of the British science fiction television series Doctor Who. Written by show runner Steven Moffat, and directed by Toby Haynes, the episode was first broadcast on 23 April 2011 in the United Kingdom, as well as the United States...

", it appeared that shooting the Doctor during his regeneration into a Twelfth Doctor killed him permanently. However, "The Wedding of River Song
The Wedding of River Song
"The Wedding of River Song" is the thirteenth and final episode of the sixth series of the British science fiction television series Doctor Who, and was first broadcast on BBC One, BBC America and Space on 1 October 2011.-Plot:...

" revealed that this was not actually the Doctor, but the robot Tesselecta, so the efficacy of a mid-regeneration killing has not been confirmed.

In an October, 2010 episode of the spin-off series, The Sarah Jane Adventures
The Sarah Jane Adventures
The Sarah Jane Adventures is a British science fiction television series, produced by BBC Cymru Wales for CBBC, created by Russell T Davies and starring Elisabeth Sladen...

, when asked by Clyde how many times he can regenerate, the Doctor (Matt Smith) flippantly replies "507". Whether this is true or just a joke is unclear, but the writer of that episode, Russell T. Davies, said it was "...too good an opportunity to miss."

Other skills include his mental communication with other Time Lords, in some cases over a galaxy's distance. His skill with hypnosis is such that he requires only a second's glance into a subject's eyes to put him/her under his spell. The Doctor can read an entire book cover to cover in a second by thumb-flipping the pages before his eyes (City of Death
City of Death
-Pre-production:Writer David Fisher had contributed two scripts to Doctor Whos sixteenth season – The Stones of Blood and The Androids of Tara – and was asked by producer Graham Williams for further story ideas...

, "Rose
Rose (Doctor Who)
"Rose" is the first episode of Series One of the British science-fiction television series Doctor Who. Written by show runner Russell T Davies and directed by Keith Boak, the episode was first broadcast on 26 March 2005....

", "The Time of Angels
The Time of Angels
"The Time of Angels" is the fourth episode in the fifth series of British science fiction television series Doctor Who, first broadcast on 24 April 2010 on BBC One. It is the first episode of a two-part story written by showrunner Steven Moffat and directed by Adam Smith; the second episode was...

"). Though any medical skills he shows early in the series are rudimentary, by Remembrance of the Daleks
Remembrance of the Daleks
Remembrance of the Daleks is a serial in the British science fiction television series Doctor Who, which was first broadcast in four weekly parts from 5 October to 26 October 1988....

he can perform sophisticated medical diagnoses merely by touching someone's ear. He is an excellent cricket
Cricket
Cricket is a bat-and-ball game played between two teams of 11 players on an oval-shaped field, at the centre of which is a rectangular 22-yard long pitch. One team bats, trying to score as many runs as possible while the other team bowls and fields, trying to dismiss the batsmen and thus limit the...

 player (Black Orchid
Black Orchid (Doctor Who)
Black Orchid is a serial in the British science fiction television series Doctor Who, which was first broadcast in two parts on 1 March and 2 March 1982...

) and in "The Lodger
The Lodger (Doctor Who)
"The Lodger" is the eleventh episode of the fifth series of the British science fiction television series Doctor Who, first broadcast on BBC One on 12 June 2010...

" he proves to be a prodigiously talented footballer despite unfamiliarity with some of the game's basic rules. Thanks to exposure to many of history's greatest experts, including those from the future, the Doctor is a talented boxer, musician, scientist, singer (able to shatter windows with his voice), sharpshooter, etc.

"Doctor who?"

In the first episode, Barbara addresses the Doctor as "Doctor Foreman", as this is the surname the Doctor's granddaughter Susan goes by, and the junkyard in which they find him bears the sign "I.M. Foreman". When addressed by Ian with this name in the next episode, the Doctor responds, "Eh? Doctor who? What's he talking about?" Later, when he realises that "Foreman" is not the Doctor's name, Ian asks Barbara, "Who is he? Doctor who?" (In an ultimately-unused idea from documents written at the series' inception, Barbara and Ian would have subsequently referred to the Doctor as "Dr. Who", given their not knowing his name.)

Similarly, in the 2005 series premiere "Rose", when asked his name, the Doctor replies, "Just 'The Doctor'." New companion Rose Tyler
Rose Tyler
Rose Marion Tyler is a fictional character portrayed by Billie Piper in the long-running British science fiction television series Doctor Who, and was created by series producer Russell T Davies...

 later finds a website devoted to the Doctor on the Internet, run by a conspiracy theorist who has been tracking the Ninth Doctor's appearances throughout history, carrying the title "Doctor Who?" (see Doctor Who tie-in websites
Doctor Who tie-in websites
The 2005 series revival of the long-running British science fiction television programme Doctor Who features several tie-in websites produced by the BBC website team that viewers can access on the Internet...

). The BBC launched a "real" version of this website with the idea that it is run by Mickey Smith
Mickey Smith
Mickey Smith is a fictional character in the British science fiction television series Doctor Who, played by Noel Clarke.Mickey is introduced as the boyfriend of the Ninth and Tenth Doctor's companion Rose Tyler, and a recurring character on the programme...

, Rose's boyfriend (who has taken over the site following the death of its originator).

Although listed in the on-screen credits for nearly twenty years as "Doctor Who" or "Dr Who", the Doctor is never really called by that name in the series, except in a tongue-in-cheek manner. For example, in The Gunfighters
The Gunfighters
The Gunfighters is a serial in the British science fiction television series Doctor Who, set in 19th Century America on the days leading up to the famous Gunfight at the O.K. Corral...

the Doctor assumes the name of Doctor Caligari
The Cabinet of Dr. Caligari
The Cabinet of Dr. Caligari is a 1920 silent horror film directed by Robert Wiene from a screenplay by Hans Janowitz and Carl Mayer. It is one of the most influential of German Expressionist films and is often considered one of the greatest horror movies of the silent era. This movie is cited as...

 and subsequently responds to the question "Doctor Who?" with "yes, quite right". Also, question marks adorning his costuming in the 1980s seem to imply the "Who" moniker. The only real exceptions are the computer WOTAN in the serial The War Machines
The War Machines
The War Machines is a serial in the British science fiction television series Doctor Who, which was first broadcast in 4 weekly parts from 25 June to 16 July 1966...

, which commands that "Doctor Who is required." Further, towards the end of the Second Doctor serial Fury from the Deep
Fury from the Deep
Fury from the Deep is a serial in the British science fiction television series Doctor Who, which originally aired in six weekly parts from 16 March to 20 April 1968...

, the Doctor is addressed as "Doctor Who" by Mr Harris during the dinner party. The Third Doctor
Third Doctor
The Third Doctor is the third incarnation of the protagonist of the long-running BBC television science-fiction series Doctor Who. He was portrayed by actor Jon Pertwee....

's car, dubbed "Bessie", carried the licence plate WHO 1, the only ongoing reference to the "Doctor Who" enigma in the original series. The Third Doctor also later drove an outlandish vehicle called the "Whomobile" in publicity materials, but it is never referred to as such in the series, being simply known as "the Doctor's car" or "my car", as the Doctor puts it. The name "Doctor Who" is also used in the title of the serial Doctor Who and the Silurians
Doctor Who and the Silurians
Doctor Who and the Silurians is a serial in the British science fiction television series Doctor Who, which was first broadcast in seven weekly parts from January 31 to March 14, 1970. The story is the first appearance of a recurring family of Earth-dwelling reptiles...

, but this was a captioning error rather than an in-story mention. The only other time this occurs is in the title of Episode 5 of The Chase
The Chase (Doctor Who)
The Chase is a serial in the British science fiction television series Doctor Who, which was first broadcast in six weekly parts from 22 May to 26 June 1965. The story is set on multiple locations including the Mary Celeste, the Empire State Building, and the planet Aridius...

: "The Death of Doctor Who".

In the Third Doctor
Third Doctor
The Third Doctor is the third incarnation of the protagonist of the long-running BBC television science-fiction series Doctor Who. He was portrayed by actor Jon Pertwee....

 serial The Dæmons
The Dæmons
The Dæmons is a serial in the British science fiction television series Doctor Who, which was first broadcast in five weekly parts from May 22 to June 19, 1971.-Plot:...

the Doctor is briefly given the alias of the Great Wizard Qui Quae Quod. This is actually the Latin
Latin
Latin is an Italic language originally spoken in Latium and Ancient Rome. It, along with most European languages, is a descendant of the ancient Proto-Indo-European language. Although it is considered a dead language, a number of scholars and members of the Christian clergy speak it fluently, and...

 relative pronoun, 'who' or 'which' (masculine, feminine and neuter forms).

In the Fourth Doctor
Fourth Doctor
The Fourth Doctor is the fourth incarnation of the protagonist of the long-running BBC British television science-fiction series Doctor Who....

 serial "The Armageddon Factor
The Armageddon Factor
The Armageddon Factor is a serial in the British science fiction television series Doctor Who, which was first broadcast in six weekly parts from 20 January to 24 February 1979...

", the Doctor runs into a former class mate of his named Drax. Drax refers to the Doctor several times as "Thete", to which the Doctor replies "It's the Doctor." "Thete" is then revealed to be short for Theta Sigma, the Doctor's nickname at Prydon Academy on Gallifrey, as also referenced in The Happiness Patrol
The Happiness Patrol
The Happiness Patrol is a serial in the British science fiction television series Doctor Who, which was first broadcast in three weekly parts from 2 November to 16 November 1988.-Plot:...

and "The Pandorica Opens
The Pandorica Opens
"The Pandorica Opens" is the twelfth episode, and first in a two-part story, in the fifth series of British science fiction television series Doctor Who, broadcast on 19 June 2010. The Doctor's friends send him a warning; he deals with a message on a cliff, a mysterious box and a love story that...

".

In "The Christmas Invasion
The Christmas Invasion
"The Christmas Invasion" is a 60-minute special episode of the British science fiction television series Doctor Who. It is Christmas, but there is little cause for celebration as planet Earth is invaded by aliens known as the Sycorax...

", the newly regenerated Doctor stumbles out of the TARDIS in a confused state in front of Jackie Tyler and Mickey. When Rose emerges from the TARDIS, she tells them that he is the Doctor, to which a confused Jackie replies "What do you mean that's the Doctor? Doctor Who?". The joke is used twice in "The Impossible Astronaut
The Impossible Astronaut
"The Impossible Astronaut" is the first episode of the sixth series of the British science fiction television series Doctor Who. Written by show runner Steven Moffat, and directed by Toby Haynes, the episode was first broadcast on 23 April 2011 in the United Kingdom, as well as the United States...

" by Matilda and, later, Canton Delaware. A similar version of this in-joke is told in the serials The Curse of Peladon
The Curse of Peladon
The Curse of Peladon is a serial in the British science fiction television series Doctor Who, which was first broadcast in four weekly parts from 29 January to 19 February 1972.-Synopsis:...

, The Five Doctors
The Five Doctors
The Five Doctors is a special feature-length episode of the British science fiction television series Doctor Who, produced in celebration of the programme's twentieth anniversary. It had its world premiere in the United States, on the Chicago PBS station WTTW and various other PBS member stations...

and the audio commentary for Revelation of the Daleks
Revelation of the Daleks
Revelation of the Daleks is a serial in the British science fiction television series Doctor Who, which was first broadcast in two weekly parts on 23 March and 30 March 1985...

reveals that Colin Baker
Colin Baker
Colin Baker is a British actor who is known for playing Paul Merroney in The Brothers from 1974 to 1976 and as the sixth incarnation of the Doctor in the long-running science fiction television series Doctor Who, from 1984 to 1986.- Background:Colin Baker was born in London, but moved north to...

 tried to slip it into that serial when the Daleks fail to recognise him. In "The Girl in the Fireplace
The Girl in the Fireplace
"The Girl in the Fireplace" is the fourth episode of the second series of the British science fiction television series Doctor Who. It was first broadcast on 6 May 2006, and is the only episode in the 2006 series written by Steven Moffat...

" (2006), Madame de Pompadour
Madame de Pompadour
Jeanne Antoinette Poisson, Marquise de Pompadour, also known as Madame de Pompadour was a member of the French court, and was the official chief mistress of Louis XV from 1745 to her death.-Biography:...

 reads the Doctor's mind and remarks about his name, "Doctor who? It's more than just a secret, isn't it?" In the podcast commentary on the BBC website, writer Steven Moffat
Steven Moffat
Steven Moffat is a Scottish television writer and producer.Moffat's first television work was the teen drama series Press Gang. His first sitcom, Joking Apart, was inspired by the breakdown of his first marriage; conversely, his later sitcom Coupling was based upon the development of his...

 suggests that, as the Doctor does not tell even his closest companions his name, there must be a "dreadful secret" about it. Within the same commentary, Moffat and actor Noel Clarke
Noel Clarke
Noel Anthony Clarke is an English actor, director and screenwriter from London. He is best known for playing Wyman Norris in Auf Wiedersehen, Pet and Mickey Smith in Doctor Who...

 jokingly suggest his name to be "Curtis". Ironically, according to the in-vision commentary on the DVD release, David Tennant
David Tennant
David Tennant is a Scottish actor. In addition to his work in theatre, including a widely praised Hamlet, Tennant is best known for his role as the tenth incarnation of the Doctor in Doctor Who, along with the title role in the 2005 TV serial Casanova and as Barty Crouch, Jr...

 had to inform actress Sophia Myles
Sophia Myles
-Early life:Myles was born in London. She is the daughter of Jane, who works in educational publishing, and Peter Myles, a retired Anglican vicar in Isleworth, west London. Her maternal grandmother was Russian, and she refers to herself as "half-Welsh, half-Russian". She grew up in Notting Hill,...

 (who played Madame de Pompadour) that she was not, in fact, revealing the Doctor's surname as she believed was the intent of the dialogue. In the 1996 telemovie, the recently regenerated and amnesiatic Eighth Doctor
Eighth Doctor
The Eighth Doctor is the eighth incarnation of the protagonist of the long-running BBC television science-fiction series Doctor Who. He was portrayed by Paul McGann...

 repeatedly screams to his reflection "Who am I?!" In "The Shakespeare Code
The Shakespeare Code
"The Shakespeare Code" is an episode of the British science fiction television series Doctor Who. It was broadcast on BBC One on 7 April 2007, and is the second episode of Series 3 of the revived Doctor Who series. According to the BARB figures this episode was seen by 7.23 million viewers and was...

", the Carrionite Lilith, unable to discover his true name, remarks, "Why would a man hide his title in such despair?" A psychically-inspired human in "The Fires of Pompeii
The Fires of Pompeii
"The Fires of Pompeii" is the second episode of the fourth series of the British science fiction television series Doctor Who. It was broadcast on BBC One on 12 April 2008....

" remarks that his name "Doctor" is false and that his true name is in fact hidden. In Moffat's "Forest of the Dead
Forest of the Dead
"Forest of the Dead" is the ninth episode of the fourth series of British science fiction television series Doctor Who. It was first broadcast by BBC One on 7 June 2008...

", the character River Song
River Song (Doctor Who)
River Song is a fictional character played primarily by Alex Kingston in the British science-fiction series Doctor Who. River Song was introduced to the series as an experienced future companion of series protagonist the Doctor, an alien Time Lord who travels through time in his TARDIS...

 reveals she knows the Doctor in his future, and it is implied that they shared a very intimate relationship. To gain his trust, she whispers something—inaudible to the audience—into his ear, which he later reveals was his real name. The Doctor states that there is "only one reason" he would reveal his name and that there is "only one time [he] could".

The dialogue joke was also used in 1981's unsuccessful pilot for K-9 and Company
K-9 and Company
K-9 and Company was a proposed television spin-off of the original programme run of Doctor Who . It was to feature former series regulars Sarah Jane Smith, an investigative journalist played by Elisabeth Sladen, and K-9, a robotic dog. Both characters had been companions of the Fourth Doctor, but...

, wherein the Fourth Doctor's robotic dog, K-9
K-9 (Doctor Who)
K-9, or K9, is the name of several fictional robotic canines in the long-running British science fiction television series, Doctor Who, first appearing in 1977...

, is discovered by his former companion, Sarah Jane Smith
Sarah Jane Smith
Sarah Jane Smith is a fictional character played by Elisabeth Sladen in the long-running British BBC Television science-fiction series Doctor Who and its spin-offs K-9 and Company and The Sarah Jane Adventures....

, and describes itself as being a gift to her from "The Doctor". Supporting character Brendan Richards asks, "Who's the doctor?" to which K-9 replies with its catch-phrase, "Affirmative." The show's events were subsequently referred to in The Five Doctors
The Five Doctors
The Five Doctors is a special feature-length episode of the British science fiction television series Doctor Who, produced in celebration of the programme's twentieth anniversary. It had its world premiere in the United States, on the Chicago PBS station WTTW and various other PBS member stations...

and the 2006 Doctor Who episode, "School Reunion
School Reunion (Doctor Who)
"School Reunion" is the third episode in the second series of the British science fiction television series Doctor Who. It first aired on 29 April 2006. The episode's narrative takes place some time after the events of "The Christmas Invasion"...

".

Doctor Who spin-off
Doctor Who spin-offs
Doctor Who spin-offs refers to material created outside of, but related to, the long-running British science fiction television series Doctor Who....

 media, which are of uncertain canonicity, have suggested that the character uses the name "the Doctor" because his actual name is impossible for humans to pronounce. For instance in the novel Vanderdeken's Children
Vanderdeken's Children
Vanderdeken's Children is an original novel written by Christopher Bulis and based on the long-running British science fiction television series Doctor Who. It features the Eighth Doctor and Sam.-Plot overview:...

, it's told that the Doctor already told Sam
Sam Jones (Doctor Who)
Samantha Angeline Jones, or simply Sam, is a fictional character in the Eighth Doctor Adventures novels based upon the British science fiction television series Doctor Who. The Eighth Doctor first met her in the novel The Eight Doctors by Terrance Dicks, and she went on to become one of his...

 his real name which is entirely alien and virtually unpronounceable. This is also repeated by companion Peri Brown
Peri Brown
Peri Brown, full name Perpugilliam Brown, is a fictional character played by Nicola Bryant in the long-running British science fiction television series Doctor Who....

 in the radio serial Slipback
Slipback
Slipback is a radio audio drama based on the long-running British science fiction television series Doctor Who, produced by the BBC and first broadcast in six episodes on BBC Radio 4 from 25 July to 8 August 1985, as part of a children's magazine show called Pirate Radio Four...

. The Faction Paradox
Faction Paradox
Faction Paradox is a fictional time travelling cult/rebel group/organized crime syndicate, originally created by the author Lawrence Miles. The Faction's belief-system as portrayed has some similarities to voodoo, and is sometimes described as such...

 encyclopaedia The Book of the War
The Book of the War
The Book of the War is a hypertext multi-author novel presented in the form of an encyclopedia of the first 50 years of the War in the Faction Paradox universe based on the Doctor Who universe. The book was edited by Lawrence Miles, and written by Miles, Simon Bucher-Jones, Daniel O'Mahony, Ian...

states that all renegades from the Homeworld/Gallifrey abandon their names to symbolise how they leave their culture. Similarly, the novel Lungbarrow
Lungbarrow
Lungbarrow is an original novel written by Marc Platt and based on the long-running British science fiction television series Doctor Who...

reveals that the Doctor's name has been struck from the records of his family and therefore cannot be spoken.

The character played by Peter Cushing
Peter Cushing
Peter Wilton Cushing, OBE was an English actor, known for his many appearances in Hammer Films, in which he played the handsome but sinister scientist Baron Frankenstein and the vampire hunter Dr. Van Helsing, amongst many other roles, often appearing opposite Christopher Lee, and occasionally...

 in the films Dr. Who and the Daleks
Dr. Who and the Daleks
Dr. Who and the Daleks was the first of two Doctor Who films made in the 1960s. It was followed by Daleks' Invasion Earth: 2150 A.D....

and Daleks – Invasion Earth: 2150 A.D. referred to himself as "Dr. Who". However, these films are not considered part of the same narrative continuity as the television series, as they were based upon two television serials featuring William Hartnell and made considerable alterations to the characters of the Doctor and his companions.

At the end of "Journey's End
Journey's End (Doctor Who)
"Journey's End" is the thirteenth episode of the fourth series of British science fiction television series Doctor Who first broadcast on BBC One on 5 July 2008. It is the second episode of a two-part crossover story featuring the characters of spin-off shows Torchwood and The Sarah Jane...

", Davros states "Never forget Doctor, you did this. I name you forever, you are 'The Destroyer of Worlds".

"The Wedding of River Song
The Wedding of River Song
"The Wedding of River Song" is the thirteenth and final episode of the sixth series of the British science fiction television series Doctor Who, and was first broadcast on BBC One, BBC America and Space on 1 October 2011.-Plot:...

" reveals that the question, "Doctor who?", is the oldest question in the universe, and that the Silence have been seeking to prevent the answer to this question from ever being revealed.

Alias "The Doctor"

Quite apart from his name, why the Doctor uses the title of "The Doctor" has never been fully explained on screen. The Doctor, at first, said that he was not a physician
Physician
A physician is a health care provider who practices the profession of medicine, which is concerned with promoting, maintaining or restoring human health through the study, diagnosis, and treatment of disease, injury and other physical and mental impairments...

, often referring to himself as a scientist
Scientist
A scientist in a broad sense is one engaging in a systematic activity to acquire knowledge. In a more restricted sense, a scientist is an individual who uses the scientific method. The person may be an expert in one or more areas of science. This article focuses on the more restricted use of the word...

 or an engineer
Engineer
An engineer is a professional practitioner of engineering, concerned with applying scientific knowledge, mathematics and ingenuity to develop solutions for technical problems. Engineers design materials, structures, machines and systems while considering the limitations imposed by practicality,...

. However he does occasionally show medical knowledge and has stated on separate occasions that he studied under Joseph Lister
Joseph Lister, 1st Baron Lister
Joseph Lister, 1st Baron Lister OM, FRS, PC , known as Sir Joseph Lister, Bt., between 1883 and 1897, was a British surgeon and a pioneer of antiseptic surgery, who promoted the idea of sterile surgery while working at the Glasgow Royal Infirmary...

 and Joseph Bell
Joseph Bell
Joseph Bell, JP, DL, FRCS was a famous Scottish lecturer at the medical school of the University of Edinburgh in the 19th century. He is perhaps best known as an inspiration for the literary character Sherlock Holmes....

. In The Moonbase
The Moonbase
The Moonbase is a serial in the British science fiction television series Doctor Who, which was first broadcast in four weekly parts from 11 February to 4 March 1967...

,
the Second Doctor
Second Doctor
The Second Doctor is the second incarnation of the protagonist of the long-running BBC television science-fiction series Doctor Who. He was portrayed by character actor Patrick Troughton....

 mentions that he studied for a medical degree in Glasgow
Glasgow
Glasgow is the largest city in Scotland and third most populous in the United Kingdom. The city is situated on the River Clyde in the country's west central lowlands...

 during the 19th Century. The Fourth Doctor was awarded an honorary degree from St. Cedd's College, Cambridge
St. Cedd's College, Cambridge
St. Cedd's College is a fictional college, created by Douglas Adams, of Cambridge University.It appears in the Doctor Who serial Shada, and in the novel Dirk Gently's Holistic Detective Agency....

 in 1960. He has also been mocked by his fellow Time Lords for adhering to such a "lowly" title as "Doctor", although in The Armageddon Factor
The Armageddon Factor
The Armageddon Factor is a serial in the British science fiction television series Doctor Who, which was first broadcast in six weekly parts from 20 January to 24 February 1979...

he tells Drax that he achieved his doctorate, indicating it was at least a somewhat respectable title. In "The Girl in the Fireplace
The Girl in the Fireplace
"The Girl in the Fireplace" is the fourth episode of the second series of the British science fiction television series Doctor Who. It was first broadcast on 6 May 2006, and is the only episode in the 2006 series written by Steven Moffat...

", he draws an analogy between the title and Madame de Pompadour
Madame de Pompadour
Jeanne Antoinette Poisson, Marquise de Pompadour, also known as Madame de Pompadour was a member of the French court, and was the official chief mistress of Louis XV from 1745 to her death.-Biography:...

's. In "The Sound of Drums
The Sound of Drums
"The Sound of Drums" is an episode of the British science fiction television series Doctor Who. It was broadcast on BBC One on 23 June 2007, and is the twelfth episode of Series 3 of the revived Doctor Who series...

", The Doctor remarks to the Master
Master (Doctor Who)
The Master is a recurring character in the British science fiction television series Doctor Who. He is a renegade Time Lord and the archenemy of the Doctor....

 that they both chose their names and The Master, in response, remarks that it was sanctimonious of the Doctor to identify himself as "the man who makes people better;" one of the Master's assistants calls him a "doctor of everything". In The Mutants
The Mutants
The Mutants is a serial in the British science fiction television series Doctor Who, which was first broadcast in six weekly parts from 8 April to 13 May 1972....

an official asks the Third Doctor if he is, in fact, a doctor, to which the Doctor replies "I am, yes"; when asked what he is qualified in, the Doctor replies, "Practically everything." The Fourth Doctor states that his companion, Harry Sullivan, is a Doctor of medicine, while he is "a doctor of many things" (Revenge of the Cybermen
Revenge of the Cybermen
Revenge of the Cybermen is a serial in the British science fiction television series Doctor Who, which was first broadcast in four weekly parts from 19 April to 10 May 1975.-Synopsis:...

). The Fifth Doctor
Fifth Doctor
The Fifth Doctor is the fifth incarnation of the protagonist of the long-running BBC television science-fiction series Doctor Who. He is portrayed by Peter Davison....

 claims to be a doctor "of everything" in Four to Doomsday
Four to Doomsday
*The working title for this story was Days Of Wrath.*Although Castrovalva was the first story aired which featured Peter Davison as the Fifth Doctor, this story was the first in the season to be produced....

, and a message is related from the Tenth Doctor in "Utopia
Utopia (Doctor Who)
"Utopia" is an episode of the British science fiction television series Doctor Who. It was broadcast on BBC One on 16 June 2007 and is the eleventh episode of series three of the revived Doctor Who series...

" that he claims to be a doctor "of everything". In talking with Harry in Robot
Robot (Doctor Who)
Robot is a serial in the British science fiction television series Doctor Who, which was first broadcast in four weekly parts from 28 December 1974 to 18 January 1975...

,
the Doctor states "You may be a doctor, but I'm the Doctor. The definite article, you might say." In The Ark in Space
The Ark in Space
The Ark in Space is a serial in the British science fiction television series Doctor Who, which was first broadcast in four weekly parts from 25 January to 15 February 1975.-Plot:The TARDIS materialises in a darkened room on board the station...

The Fourth Doctor states that his doctorate is only honorary; the Tenth Doctor, however, considers the name to be his legitimate academic rank in "The Waters of Mars
The Waters of Mars
"The Waters of Mars" is the second 2009 special of British science fiction television series Doctor Who, broadcast on BBC One on 15 November 2009. It aired on BBC America on 19 December 2009 and was released on DVD and Blu-ray in the UK on 11 January 2010 and in the US on 2 February 2010...

": in response to an order to give his name, rank and the nature of his business on the planet, he responds, "The Doctor; doctor; fun."

The Telos novella
Telos Doctor Who novellas
The Telos Doctor Who novellas were a series of tie-in novellas based on the long-running BBC science fiction television series Doctor Who, officially licensed by the BBC and published by Telos Publishing Ltd...

 Frayed
Frayed
Frayed is an original novella written by Tara Samms and based on the long-running British science fiction television series Doctor Who. It features the First Doctor and Susan. It was released both as a standard edition hardback and a deluxe edition featuring a frontispiece by Chris Moore...

by Tara Samms
Stephen Cole (writer)
Stephen Cole is an author of children's books and science fiction. He was also in charge of BBC Worldwide's merchandising of the BBC Television series Doctor Who between 1997 and 1999: this was a role which found him deciding on which stories should be released on video, commissioning and editing...

 (which takes place prior to "An Unearthly Child") has the First Doctor
First Doctor
The First Doctor is the initial incarnation of the protagonist of the long-running BBC television science-fiction series Doctor Who. He was portrayed by the actor William Hartnell from 1963 to 1966. Hartnell reprised the role in the tenth anniversary story The Three Doctors in 1973 - albeit in a...

 being given that title by the staff of a besieged human medical facility on the planet Iwa, suggesting at the end that the Doctor liked the official title so much that he adopted it. However, this does not quite explain why the Time Lords use the same title in addressing him. The same story also has Jill, a young girl living in the facility, naming the Doctor's granddaughter "Susan" after Jill's mother. The canonicity of all non-television sources is uncertain.

In "A Good Man Goes to War
A Good Man Goes to War
"A Good Man Goes to War" is the seventh episode of the sixth series of the British science fiction television series Doctor Who, and was first broadcast on BBC One on 4 June 2011...

", Dr River Song
River Song (Doctor Who)
River Song is a fictional character played primarily by Alex Kingston in the British science-fiction series Doctor Who. River Song was introduced to the series as an experienced future companion of series protagonist the Doctor, an alien Time Lord who travels through time in his TARDIS...

 explains that, as the Doctor has travelled throughout space and time, cultures have adopted his name as a word for "healer and wise man". In some worlds, however, "Doctor" has an entirely different definition. To the people of the Gamma Forests, his name came to mean "mighty warrior". Also in "A Good Man Goes to War
A Good Man Goes to War
"A Good Man Goes to War" is the seventh episode of the sixth series of the British science fiction television series Doctor Who, and was first broadcast on BBC One on 4 June 2011...

", it is implied that River knows the baby cot was the Doctor's because she can read Gallifreyan and thus, read his actual name.

To make up for his lack of a practical name, the Doctor often relies upon convenient pseudonyms. In The Gunfighters
The Gunfighters
The Gunfighters is a serial in the British science fiction television series Doctor Who, set in 19th Century America on the days leading up to the famous Gunfight at the O.K. Corral...

,
the First Doctor uses the alias Dr. Caligari. In The Highlanders
The Highlanders (Doctor Who)
The Highlanders is a serial in the British science fiction television series Doctor Who, which was first broadcast in four weekly parts from 17 December 1966 to 7 January 1967....

,
the Second Doctor assumes the name of "Doctor von Wer" (a German approximation of "Doctor Who"), and signs himself as "Dr. W" in The Underwater Menace
The Underwater Menace
The Underwater Menace is a serial in the British science fiction television series Doctor Who, which was first broadcast in four weekly parts from 14 January 1967 to 4 February 1967. The story constitutes Jamie McCrimmon's first journey with the Doctor as a travelling companion.-Plot:The TARDIS...

.
The Eighth Doctor
Eighth Doctor
The Eighth Doctor is the eighth incarnation of the protagonist of the long-running BBC television science-fiction series Doctor Who. He was portrayed by Paul McGann...

's companion Grace
Grace Holloway
Dr. Grace Holloway is a fictional character played by Daphne Ashbrook in the 1996 television movie Doctor Who, a continuation of the long-running British science fiction television series Doctor Who...

 briefly refers to him by the alias "Dr. Bowman" in the 1996 Doctor Who television movie
Doctor Who (1996)
Doctor Who is a television movie based on the British science fiction television series Doctor Who. Developed as a co-production amongst Universal Television, BBC Television, BBC Worldwide, and the American network FOX, the 1996 television film premiered on 12 May 1996 on CITV in Edmonton,...

.

In The Wheel in Space
The Wheel in Space
The Wheel in Space is a serial in the British science fiction television series Doctor Who, which originally aired in six weekly parts from 27 April to 1 June 1968...

, his companion Jamie McCrimmon
Jamie McCrimmon
James Robert "Jamie" McCrimmon is a fictional character played by Frazer Hines in the long-running British science fiction television series Doctor Who. A piper of the Clan McLaren who lived in 18th century Scotland, he was a companion of the Second Doctor and a regular in the programme from 1966...

, reading the name off some medical equipment, tells the crew of the Wheel that the Doctor's name is "John Smith." The Doctor subsequently adopts this alias several times over the course of the series, often prefixing the title "Doctor" to it. This name is particularly prominent during his third incarnation
Third Doctor
The Third Doctor is the third incarnation of the protagonist of the long-running BBC television science-fiction series Doctor Who. He was portrayed by actor Jon Pertwee....

 when, as scientific advisor to UNIT
UNIT
UNIT is a fictional military organisation from the British science fiction television series Doctor Who, Torchwood and The Sarah Jane Adventures...

, he gives it to Brigadier Lethbridge-Stewart
Brigadier Lethbridge-Stewart
Brigadier Sir Alistair Gordon Lethbridge-Stewart, generally referred to simply as the Brigadier, is a fictional character in the British science fiction television series Doctor Who, played by Nicholas Courtney...

 to be put on his official credentials; the Seventh Doctor
Seventh Doctor
The Seventh Doctor is the seventh incarnation of the protagonist of the long-running BBC television science-fiction series Doctor Who. He was portrayed by the actor Sylvester McCoy....

 briefly used these old John Smith credentials in Battlefield
Battlefield (Doctor Who)
Battlefield is a serial in the British science fiction television series Doctor Who, which was first broadcast in four weekly parts from September 6 to September 27, 1989. It was the last appearance of Brigadier Lethbridge-Stewart in Doctor Who....

. In the 1996 telemovie, Chang Lee (who had only met the semi-conscious Seventh Doctor
Seventh Doctor
The Seventh Doctor is the seventh incarnation of the protagonist of the long-running BBC television science-fiction series Doctor Who. He was portrayed by the actor Sylvester McCoy....

 minutes earlier and did not know his identity) gives him the name John Smith on the emergency medical treatment form; the Tenth Doctor
Tenth Doctor
The Tenth Doctor is the tenth incarnation of the protagonist of the long-running BBC television science-fiction series Doctor Who. He is played by David Tennant, who appears in three series, as well as eight specials...

 is admitted to hospital under that name again when he meets Martha Jones
Martha Jones
Martha Jones is a fictional character played by Freema Agyeman in the long-running British science fiction television series Doctor Who and its spin-off series, Torchwood. She is a companion of the Tenth Doctor in Doctor Who, replacing Rose Tyler...

 in "Smith and Jones
Smith and Jones (Doctor Who)
"Smith and Jones" is the first episode of the third series of the British science fiction television series Doctor Who. It was first broadcast on BBC One on 31 March 2007. It sees the debut of Freema Agyeman as new companion Martha Jones...

". The Tenth Doctor
Tenth Doctor
The Tenth Doctor is the tenth incarnation of the protagonist of the long-running BBC television science-fiction series Doctor Who. He is played by David Tennant, who appears in three series, as well as eight specials...

 is also using the name when he unsuspectingly meets Sarah Jane Smith
Sarah Jane Smith
Sarah Jane Smith is a fictional character played by Elisabeth Sladen in the long-running British BBC Television science-fiction series Doctor Who and its spin-offs K-9 and Company and The Sarah Jane Adventures....

 whom he had not seen for several incarnations. Suspicious but in public, Sarah Jane mentions that she used to know a man who sometimes used that name. He explains, "It's a very common name." In response, she remarks, "He's a very un-common man." When posing as his own 'Living Flesh' doppelgänger in "The Rebel Flesh
The Rebel Flesh
"The Rebel Flesh" is the fifth episode of the sixth series of the British science fiction television series Doctor Who, which was first broadcast on 21 May 2011 on BBC One and on BBC America in the United States...

", the Eleventh Doctor
Eleventh Doctor
The Eleventh Doctor is the eleventh incarnation of the protagonist of the BBC television science-fiction series Doctor Who. Matt Smith plays this incarnation, replacing David Tennant's Tenth Doctor in the 2010 episode "The End of Time, Part Two"...

 suggests the others call him John Smith for convenience.

In the audio adventure, The Sirens of Time
The Sirens of Time
The Sirens of Time is the first Big Finish Productions audio drama based on the long-running British science fiction television series Doctor Who. The story was written by Nicholas Briggs and stars Peter Davison, Colin Baker and Sylvester McCoy...

, when the Fifth Doctor is asked his name, this conversation ensues:

"I'm the Doctor."

"Doctor? That's a profession, not a name."

"It's all I have."



In "New Earth
New Earth
"New Earth" is the first episode of the second series of the British science fiction television series Doctor Who, first broadcast on 15 April 2006. It is a sequel to the first series episode "The End of the World", and brings back its villain who was thought to be destroyed, Lady Cassandra, as...

", it is implied that the Doctor is part of the prophecy of the Face of Boe
Face of Boe
The Face of Boe is a fictional character in the British science fiction television series Doctor Who. Not portrayed on-screen by an actor, the Face of Boe is a wholly mechanical effect, resembling in appearance a gigantic, wrinkly human-like head with, in place of hair, numerous tendrils which...

 and is referred to as "The Lonely God." In "Tooth and Claw", having landed in Scotland, the Tenth Doctor introduces himself as "Dr. James McCrimmon", from the township of Balamory
Balamory
Balamory was a live action television series on British television for pre-school children, based around the fictional small island community of Balamory in Scotland. It was produced between 2002 and 2005 by BBC Scotland, with 254 episodes made...

, in reference to the Second Doctor
Second Doctor
The Second Doctor is the second incarnation of the protagonist of the long-running BBC television science-fiction series Doctor Who. He was portrayed by character actor Patrick Troughton....

's companion Jamie McCrimmon
Jamie McCrimmon
James Robert "Jamie" McCrimmon is a fictional character played by Frazer Hines in the long-running British science fiction television series Doctor Who. A piper of the Clan McLaren who lived in 18th century Scotland, he was a companion of the Second Doctor and a regular in the programme from 1966...

 who had first given him the John Smith alias. Later in that episode, the Doctor is knighted by Queen Victoria
Victoria of the United Kingdom
Victoria was the monarch of the United Kingdom of Great Britain and Ireland from 20 June 1837 until her death. From 1 May 1876, she used the additional title of Empress of India....

 as "Sir Doctor of TARDIS"; she then declared him an enemy of the crown and banished him for all time, with Torchwood
Torchwood
Torchwood is a British science fiction television programme created by Russell T Davies. The series is a spin-off from Davies's 2005 revival of the long-running science fiction programme Doctor Who. The show has shifted its broadcast channel each series to reflect its growing audience, moving from...

 in part created to enforce this exile.

To his greatest enemies, the Dalek
Dalek
The Daleks are a fictional extraterrestrial race of mutants from the British science fiction television series Doctor Who. Within the series, Daleks are cyborgs from the planet Skaro, created by the scientist Davros during the final years of a thousand-year war against the Thals...

s, the Doctor is known as the Ka Faraq Gatri, the "Bringer of Darkness", or "Destroyer of Worlds". This is first mentioned in the novelisation of Remembrance of the Daleks
Remembrance of the Daleks
Remembrance of the Daleks is a serial in the British science fiction television series Doctor Who, which was first broadcast in four weekly parts from 5 October to 26 October 1988....

by Ben Aaronovitch
Ben Aaronovitch
Ben Denis Aaronovitch is a London-born British writer who has worked on television series including Doctor Who, Casualty, Jupiter Moon and Dark Knight...

 and subsequently taken up in the spin-off media, particularly the Virgin New Adventures
Virgin New Adventures
The Virgin New Adventures were a series of novels from Virgin Publishing based on the British science-fiction television series Doctor Who...

 books and the Doctor Who Magazine
Doctor Who Magazine
Doctor Who Magazine is a magazine devoted to the long-running British science fiction television series Doctor Who...

comic strip. Davros
Davros
Davros is a character from the long-running British science fiction television series Doctor Who. Davros is an archenemy of the Doctor and is the creator of the Doctor's deadliest enemies, the Daleks...

 uses the title "Destroyer of Worlds" to describe the Doctor in "Journey's End
Journey's End (Doctor Who)
"Journey's End" is the thirteenth episode of the fourth series of British science fiction television series Doctor Who first broadcast on BBC One on 5 July 2008. It is the second episode of a two-part crossover story featuring the characters of spin-off shows Torchwood and The Sarah Jane...

." In the Virgin New Adventures novel Love and War
Love and War (Doctor Who)
Love and War is an original novel written by Paul Cornell and based on the long-running British science fiction television series Doctor Who. It features the Seventh Doctor, Ace and introduces a new companion, Bernice Summerfield...

, the Doctor is referred to as "The Oncoming Storm" by the Draconians
Draconian (Doctor Who)
The Draconians are a fictional extraterrestrial race from the British science fiction television series Doctor Who. Their only television appearance to date was in the 1973 serial Frontier in Space. Unlike many "monster" races in Doctor Who, the Draconians were articulate and portrayed as having a...

 (whose word for it is "Karshtakavaar"); according to the episode "The Parting of the Ways
The Parting of the Ways
"The Parting of the Ways" is an episode in the British science fiction television series Doctor Who, which was first broadcast on 18 June 2005. It was the second episode of the two-part story that featured Christopher Eccleston making his last appearance as the Ninth Doctor...

", the same title is used by the Daleks. The Doctor refers to himself as "The Oncoming Storm" in "The Lodger
The Lodger (Doctor Who)
"The Lodger" is the eleventh episode of the fifth series of the British science fiction television series Doctor Who, first broadcast on BBC One on 12 June 2010...

."

In The End of Time
The End of Time
The End of Time: The Next Revolution in Our Understanding of the Universe, also sold with the alternate subtitle The Next Revolution in Physics, is a 1999 science book in which the author Julian Barbour argues that time exists merely as an illusion.-Auto-biography:The book begins by describing how...

,
it is mentioned that after smiting a demon in the 13th century, the residents of a convent called the Doctor the "sainted physician."

The series has also occasionally toyed with the Doctor's identity (or lack thereof). In the first part of The Mysterious Planet
The Mysterious Planet
-Preproduction:In February 1985, the BBC announced that the planned twenty-third season of Doctor Who had been cancelled. After vocal protests by the press and Doctor Who fans , the BBC announced that the programme was merely on "hiatus", and would return in September 1986...

,
the Doctor suggests writing a thesis on "Ancient Life on Ravolox, by Doctor...", but is interrupted by Perpurgilliam "Peri" Brown
Peri Brown
Peri Brown, full name Perpugilliam Brown, is a fictional character played by Nicola Bryant in the long-running British science fiction television series Doctor Who....

. In The Armageddon Factor, the Time Lord Drax addresses the Fourth Doctor
Fourth Doctor
The Fourth Doctor is the fourth incarnation of the protagonist of the long-running BBC British television science-fiction series Doctor Who....

 as "Thete", short for "Theta Sigma". Later, in The Happiness Patrol
The Happiness Patrol
The Happiness Patrol is a serial in the British science fiction television series Doctor Who, which was first broadcast in three weekly parts from 2 November to 16 November 1988.-Plot:...

,
this was clarified as a nickname from the Doctor's University days; he is called by this name again in the Paul Cornell novel Goth Opera
Goth Opera
Goth Opera is an original Doctor Who novel, published by Virgin Publishing in their Missing Adventures range of Doctor Who novels...

.
In Remembrance of the Daleks, the Seventh Doctor produces a calling card with a series of pseudo-Greek
Greek alphabet
The Greek alphabet is the script that has been used to write the Greek language since at least 730 BC . The alphabet in its classical and modern form consists of 24 letters ordered in sequence from alpha to omega...

 letters inscribed on it (as well as a stylised question mark). This may be a reference to Terrance Dicks
Terrance Dicks
Terrance Dicks is an English writer, best known for his work in television and for writing a large number of popular children's books during the 1970s and 80s.- Early career :...

's and Malcolm Hulke
Malcolm Hulke
Malcolm Hulke was a British television writer and author of the industry "bible" Writing for Television in the 70s...

's book The Making of Doctor Who (1972), which claims that the Doctor's true name is a string of Greek letters and mathematical symbols.

The question mark motif was common throughout the eighties, in part as a branding attempt. Beginning with season eighteen, the Fourth
Fourth Doctor
The Fourth Doctor is the fourth incarnation of the protagonist of the long-running BBC British television science-fiction series Doctor Who....

 through Seventh Doctor
Seventh Doctor
The Seventh Doctor is the seventh incarnation of the protagonist of the long-running BBC television science-fiction series Doctor Who. He was portrayed by the actor Sylvester McCoy....

s all sported costumes with a red question mark motif (usually on the shirt collars, except for the Seventh Doctor—it appeared on his pullover and in the shape of his umbrella handle). In the 1978 serial The Invasion of Time, the Fourth Doctor is asked to sign a document; although the signature itself is not directly seen on screen, his hand movements clearly indicate that he signs it with a question mark. A similar scene occurs with the Seventh Doctor in Remembrance of the Daleks.

In an interview with The Age in 2003, Tom Baker
Tom Baker
Thomas Stewart "Tom" Baker is a British actor. He is best known for playing the fourth incarnation of the Doctor in the science fiction television series Doctor Who, a role he played from 1974 to 1981.-Early life:...

 mentioned that the Doctor is called so because he is "a doctor of time and relative dimension in space". Apart from being called a doctor of the TARDIS, the Doctor has also been referred to as just a "doctor of time travel."

In "The Lodger
The Lodger (Doctor Who)
"The Lodger" is the eleventh episode of the fifth series of the British science fiction television series Doctor Who, first broadcast on BBC One on 12 June 2010...

", the Eleventh Doctor
Eleventh Doctor
The Eleventh Doctor is the eleventh incarnation of the protagonist of the BBC television science-fiction series Doctor Who. Matt Smith plays this incarnation, replacing David Tennant's Tenth Doctor in the 2010 episode "The End of Time, Part Two"...

 states, "I'm the Doctor. Well, they call me 'the Doctor', I don't know why; I call me 'the Doctor' too, still don't know why."

On-screen credits

In the early years of the spin-off
Doctor Who spin-offs
Doctor Who spin-offs refers to material created outside of, but related to, the long-running British science fiction television series Doctor Who....

 comic strips, books, films and other media, the character was initially called "Doctor Who" (or just "Dr Who") in the stories as a matter of course. This usage declined as the years went by.

Perhaps complicating the matter is that, from the first television serial through to Logopolis
Logopolis
Logopolis is a serial in the British science fiction television series Doctor Who, which was first broadcast in four weekly parts from 28 February to 21 March 1981. It was Tom Baker's last story as the Doctor and marks the first appearance of Peter Davison in the role...

(the last story of Season 18 and also of the Tom Baker era), the lead character was credited as "Doctor Who" (or sometimes "Dr Who"). Starting from Peter Davison
Peter Davison
Peter Davison is a British actor, best known for his roles as Tristan Farnon in the television version of James Herriot's All Creatures Great and Small and the fifth incarnation of the Doctor in Doctor Who, which he played from 1982 to 1984.-Early life:Davison was born Peter Moffett in Streatham,...

's first story, Castrovalva (the first story of the series' Season 19) to the end of Season 26, he is credited simply as "The Doctor".

This format is continued in the 1996 television movie for Paul McGann's credit, while Sylvester McCoy's incarnation is credited as "The Old Doctor". For the 2005 revival starring Christopher Eccleston
Christopher Eccleston
Christopher Eccleston is an English stage, film and television actor. His films include Let Him Have It, Shallow Grave, Elizabeth, 28 Days Later, Gone in 60 Seconds, The Others, and G.I. Joe: The Rise of Cobra...

, the credit reverted to "Doctor Who". However, in "The Christmas Invasion
The Christmas Invasion
"The Christmas Invasion" is a 60-minute special episode of the British science fiction television series Doctor Who. It is Christmas, but there is little cause for celebration as planet Earth is invaded by aliens known as the Sycorax...

", and subsequent stories featuring David Tennant
David Tennant
David Tennant is a Scottish actor. In addition to his work in theatre, including a widely praised Hamlet, Tennant is best known for his role as the tenth incarnation of the Doctor in Doctor Who, along with the title role in the 2005 TV serial Casanova and as Barty Crouch, Jr...

, the character is once again identified in the closing credits as "The Doctor", with "The Parting of the Ways
The Parting of the Ways
"The Parting of the Ways" is an episode in the British science fiction television series Doctor Who, which was first broadcast on 18 June 2005. It was the second episode of the two-part story that featured Christopher Eccleston making his last appearance as the Ninth Doctor...

" being the only episode to feature David Tennant in which he is credited as playing "Doctor Who". According to Doctor Who Magazine
Doctor Who Magazine
Doctor Who Magazine is a magazine devoted to the long-running British science fiction television series Doctor Who...

#367 this reversion was specifically requested by Tennant. The lead character credit has remained "The Doctor" for Matt Smith's tenure as the eleventh incarnation.

In the 2007 finale episode "The Sound of Drums", the Doctor tells the Master, "You chose it [his name]. Psychiatrist's field day." In response, the Master states, "As you chose yours. The man who makes people better. How sanctimonious is that?"

Changing faces

The changing of actors playing the part of the Doctor is explained within the series by the Time Lord
Time Lord
The Time Lords are an ancient extraterrestrial race and civilization of humanoids in the British science fiction television series Doctor Who, of which the series' eponymous protagonist, the Doctor, is a member...

s' ability to regenerate
Regeneration (Doctor Who)
Regeneration, in the British science fiction television series Doctor Who, is a biological ability exhibited by Time Lords, a race of fictional humanoids originating on the planet Gallifrey. This process allows a Time Lord who is old or mortally wounded to undergo a transformation into a new...

 after suffering illness, mortal injury or old age. The process repairs all damage and rejuvenates his body, but as a side effect it changes his physical appearance and personality. This ability was not introduced until producers had to find a way to replace the ailing William Hartnell
William Hartnell
William Henry Hartnell was an English actor. During 1963-66, he was the first actor to play the Doctor in the long-running BBC science fiction television series Doctor Who.-Early life:...

 with Patrick Troughton
Patrick Troughton
Patrick George Troughton was an English actor most widely known for his roles in fantasy, science fiction and horror films, particularly in his role as the second incarnation of the Doctor in the long-running British science-fiction television series Doctor Who, which he played from 1966 to 1969,...

 and was not explicitly called "regeneration" until Jon Pertwee
Jon Pertwee
John Devon Roland Pertwee , was an English actor. Pertwee is best known for his role in the BBC science fiction television series Doctor Who, in which he played the third incarnation of the Doctor from 1970 to 1974, and as the title character in the series Worzel Gummidge...

's transformation to Tom Baker
Tom Baker
Thomas Stewart "Tom" Baker is a British actor. He is best known for playing the fourth incarnation of the Doctor in the science fiction television series Doctor Who, a role he played from 1974 to 1981.-Early life:...

 at the climax of Planet of the Spiders
Planet of the Spiders
Planet of the Spiders is a serial in the British science fiction television series Doctor Who, which was first broadcast in six weekly parts from May 4 to June 8, 1974. It was Jon Pertwee's last serial as the Doctor and marks the first, uncredited appearance of Tom Baker in the role. It also marks...

(1974). On screen, the transformation from Hartnell to Troughton was called a "renewal" and from Troughton to Pertwee a "change of appearance".

The original concept of regeneration or renewal was that the Doctor's body would rebuild itself in a younger, healthier form. The Second Doctor was intended to be a literally younger version of the First; biological time would turn back, and several hundred years would get taken off the Doctor's age, rejuvenating him. In practice, however, after the Doctor stated his age in the Second Doctor serial The Tomb of the Cybermen
The Tomb of the Cybermen
The Tomb of the Cybermen is a serial in the British science fiction television series Doctor Who that originally aired in four weekly parts from September 2 to September 23, 1967 and is the earliest serial starring Patrick Troughton as the Second Doctor to exist in its entirety...

(1967), the Doctor's age has been recorded progressively, however many regenerations the Doctor goes through (but see below). In six out of ten transitions, the new actor was younger than his predecessor had been when he began the role. In the revived series the pattern is resumed with the transition of the Ninth to the Tenth and the Tenth to the Eleventh Doctor, although current showrunner Steven Moffat is on record stating the intention was to cast an actor in his mid 30s to 40s for the role of the Eleventh Doctor, despite casting Matt Smith who is the youngest actor to ever have played the role.

The actors who have played the Doctor in the series, and the dates of their first and last regular television appearances in the role, are:
Order | Actor | Start | End
Date Age Date Age
First Doctor
First Doctor
The First Doctor is the initial incarnation of the protagonist of the long-running BBC television science-fiction series Doctor Who. He was portrayed by the actor William Hartnell from 1963 to 1966. Hartnell reprised the role in the tenth anniversary story The Three Doctors in 1973 - albeit in a...

 
William Hartnell
William Hartnell
William Henry Hartnell was an English actor. During 1963-66, he was the first actor to play the Doctor in the long-running BBC science fiction television series Doctor Who.-Early life:...

 
23 November 1963 55 29 October 1966 58
Second Doctor
Second Doctor
The Second Doctor is the second incarnation of the protagonist of the long-running BBC television science-fiction series Doctor Who. He was portrayed by character actor Patrick Troughton....

 
Patrick Troughton
Patrick Troughton
Patrick George Troughton was an English actor most widely known for his roles in fantasy, science fiction and horror films, particularly in his role as the second incarnation of the Doctor in the long-running British science-fiction television series Doctor Who, which he played from 1966 to 1969,...

 
29 October 1966 46 21 June 1969 49
Third Doctor
Third Doctor
The Third Doctor is the third incarnation of the protagonist of the long-running BBC television science-fiction series Doctor Who. He was portrayed by actor Jon Pertwee....

 
Jon Pertwee
Jon Pertwee
John Devon Roland Pertwee , was an English actor. Pertwee is best known for his role in the BBC science fiction television series Doctor Who, in which he played the third incarnation of the Doctor from 1970 to 1974, and as the title character in the series Worzel Gummidge...

 
3 January 1970 50 8 June 1974 54
Fourth Doctor
Fourth Doctor
The Fourth Doctor is the fourth incarnation of the protagonist of the long-running BBC British television science-fiction series Doctor Who....

 
Tom Baker
Tom Baker
Thomas Stewart "Tom" Baker is a British actor. He is best known for playing the fourth incarnation of the Doctor in the science fiction television series Doctor Who, a role he played from 1974 to 1981.-Early life:...

 
8 June 1974 40 21 March 1981 47
Fifth Doctor
Fifth Doctor
The Fifth Doctor is the fifth incarnation of the protagonist of the long-running BBC television science-fiction series Doctor Who. He is portrayed by Peter Davison....

 
Peter Davison
Peter Davison
Peter Davison is a British actor, best known for his roles as Tristan Farnon in the television version of James Herriot's All Creatures Great and Small and the fifth incarnation of the Doctor in Doctor Who, which he played from 1982 to 1984.-Early life:Davison was born Peter Moffett in Streatham,...

 
21 March 1981 29 16 March 1984 32
Sixth Doctor
Sixth Doctor
The Sixth Doctor is the sixth incarnation of the protagonist of the long-running BBC television science-fiction series Doctor Who. He was portrayed by Colin Baker...

 
Colin Baker
Colin Baker
Colin Baker is a British actor who is known for playing Paul Merroney in The Brothers from 1974 to 1976 and as the sixth incarnation of the Doctor in the long-running science fiction television series Doctor Who, from 1984 to 1986.- Background:Colin Baker was born in London, but moved north to...

 
16 March 1984 40 6 December 1986 43
Seventh Doctor
Seventh Doctor
The Seventh Doctor is the seventh incarnation of the protagonist of the long-running BBC television science-fiction series Doctor Who. He was portrayed by the actor Sylvester McCoy....

 
Sylvester McCoy
Sylvester McCoy
Sylvester McCoy is a Scottish actor. As a comic act and busker he appeared regularly on stage and on BBC Children's television in the 1970s and 80s, but is best known for playing the seventh incarnation of the Doctor in the long-running science fiction television series Doctor Who from 1987 to...

 
7 September 1987 44 6 December 1989 46
Eighth Doctor
Eighth Doctor
The Eighth Doctor is the eighth incarnation of the protagonist of the long-running BBC television science-fiction series Doctor Who. He was portrayed by Paul McGann...

 
Paul McGann
Paul McGann
Paul McGann is an English actor who made his name on the BBC serial The Monocled Mutineer, in which he played the lead role...

 
27 May 1996 36 27 May 1996 36
Ninth Doctor
Ninth Doctor
The Ninth Doctor is the ninth incarnation of the protagonist of the long-running BBC television science-fiction series Doctor Who. He is played by Christopher Eccleston....

 
Christopher Eccleston
Christopher Eccleston
Christopher Eccleston is an English stage, film and television actor. His films include Let Him Have It, Shallow Grave, Elizabeth, 28 Days Later, Gone in 60 Seconds, The Others, and G.I. Joe: The Rise of Cobra...

 
26 March 2005 41 18 June 2005 41
Tenth Doctor
Tenth Doctor
The Tenth Doctor is the tenth incarnation of the protagonist of the long-running BBC television science-fiction series Doctor Who. He is played by David Tennant, who appears in three series, as well as eight specials...

 
David Tennant
David Tennant
David Tennant is a Scottish actor. In addition to his work in theatre, including a widely praised Hamlet, Tennant is best known for his role as the tenth incarnation of the Doctor in Doctor Who, along with the title role in the 2005 TV serial Casanova and as Barty Crouch, Jr...

 
18 June 2005 34 1 January 2010 38
Eleventh Doctor
Eleventh Doctor
The Eleventh Doctor is the eleventh incarnation of the protagonist of the BBC television science-fiction series Doctor Who. Matt Smith plays this incarnation, replacing David Tennant's Tenth Doctor in the 2010 episode "The End of Time, Part Two"...

 
Matt Smith  1 January 2010 27
Current

Personality

Throughout his regenerations, the Doctor's personality has retained a number of consistent traits. Its most notable aspect is an unpredictable, affable, clownish exterior concealing a well of great age, wisdom, seriousness and even darkness. While the Doctor can appear childlike and jocular, when the stakes rise, as, for example, in Pyramids of Mars
Pyramids of Mars
Pyramids of Mars is a serial in the British science fiction television series Doctor Who, which was first broadcast in four weekly parts from 25 October to 15 November 1975.-Synopsis:...

, he will often become cold, driven and callous. Another aspect of the Doctor's persona, which, though always present, has been emphasised or downplayed from incarnation to incarnation, is compassion
Compassion
Compassion is a virtue — one in which the emotional capacities of empathy and sympathy are regarded as a part of love itself, and a cornerstone of greater social interconnection and humanism — foundational to the highest principles in philosophy, society, and personhood.There is an aspect of...

. The Doctor is a fervent pacifist and is dedicated to the preservation of sentient life, human or otherwise, over violence and war, even going so far as to doubt the morality of destroying his worst enemies, the Dalek
Dalek
The Daleks are a fictional extraterrestrial race of mutants from the British science fiction television series Doctor Who. Within the series, Daleks are cyborgs from the planet Skaro, created by the scientist Davros during the final years of a thousand-year war against the Thals...

s, when he has the chance to do so in Genesis of the Daleks
Genesis of the Daleks
Genesis of the Daleks is a serial in the British science fiction television series Doctor Who that was originally broadcast in six weekly parts from 8 March to 12 April 1975. It marks the first appearance of Davros, the creator of the Daleks.-Plot:...

, and again in Evolution of the Daleks
Evolution of the Daleks
"Evolution of the Daleks" is an episode of the British science fiction television series Doctor Who. It was first broadcast on BBC One on 28 April 2007, and is the fifth episode of Series 3 of the revived Doctor Who series. It is the conclusion of the two-part story begun in "Daleks in...

. He also, in The Time Monster
The Time Monster
The Time Monster is a serial in the British science fiction television series Doctor Who, which was first broadcast in six weekly parts from 20 May to 24 June 1972.- Synopsis :...

, begs Kronos to spare the Master torment or death, unintentionally winning the evil Time Lord's freedom, which he tells Jo Grant was preferable anyway, and forgives the Master for his actions in The Sound of Drums
The Sound of Drums
"The Sound of Drums" is an episode of the British science fiction television series Doctor Who. It was broadcast on BBC One on 23 June 2007, and is the twelfth episode of Series 3 of the revived Doctor Who series...

and Last of the Time Lords
Last of the Time Lords
"Last of the Time Lords" is an episode of the British science fiction television series Doctor Who. It was broadcast on BBC One on 30 June 2007, and is the thirteenth and final episode of Series 3 of the revived Doctor Who series...

, vowing to take responsibility for his former friend.

Nonetheless, the Doctor will kill when given no other option and occasionally in self-defence; examples of this can be seen in The Tomb of the Cybermen
The Tomb of the Cybermen
The Tomb of the Cybermen is a serial in the British science fiction television series Doctor Who that originally aired in four weekly parts from September 2 to September 23, 1967 and is the earliest serial starring Patrick Troughton as the Second Doctor to exist in its entirety...

, The Dominators
The Dominators
The Dominators is a serial in the British science fiction television series Doctor Who, which originally aired in five weekly parts from 10 August to 7 September 1968.-Plot:...

, The Invasion
The Invasion (Doctor Who)
The Invasion is a serial in the British science fiction television series Doctor Who, which was first broadcast in eight weekly parts from 2 November to 21 December 1968...

, The Krotons
The Krotons
The Krotons is a serial in the British science fiction television series Doctor Who, which was first broadcast in four weekly parts from December 28, 1968 to January 18, 1969...

, Spearhead from Space
Spearhead from Space
Spearhead from Space is a serial in the British science fiction television series Doctor Who, which was first broadcast in four weekly parts from 3 January to 24 January 1970. The serial opened Series 7 of the show and was the first to be produced in colour. The serial introduced Jon Pertwee as the...

, The Sea Devils
The Sea Devils
The Sea Devils is a serial in the British science fiction television series Doctor Who, which was first broadcast in six weekly parts from February 26 to April 1, 1972.-Synopsis:...

, The Three Doctors, The Brain of Morbius
The Brain of Morbius
The Brain of Morbius is a serial in the British science fiction television series Doctor Who, which was first broadcast in four weekly parts from 3 January to 24 January 1976...

, The Talons of Weng-Chiang
The Talons of Weng-Chiang
The Talons of Weng-Chiang is a serial in the British science fiction television series Doctor Who, which was first broadcast in six weekly parts from 26 February to 2 April 1977.-Synopsis:...

, The Invasion of Time
The Invasion of Time
The Invasion of Time is a serial in the British science fiction television series Doctor Who, which was first broadcast in six weekly parts from 4 February to 11 March 1978...

, Earthshock
Earthshock
Earthshock is a serial in the British science fiction television series Doctor Who, which was first broadcast in four twice-weekly parts from 8 March to 16 March 1982...

, Vengeance on Varos
Vengeance on Varos
Vengeance on Varos is a serial in the British science fiction television series Doctor Who, which was first broadcast in two weekly parts from 19–26 January 1985.-Synopsis:...

, The Two Doctors
The Two Doctors
The Two Doctors is a serial in the British science fiction television series Doctor Who, which was first broadcast in three weekly parts from 16 February to 2 March 1985. It starred Colin Baker and Nicola Bryant as the Sixth Doctor and his companion Peri, respectively...

, Silver Nemesis
Silver Nemesis
Silver Nemesis was the 25th anniversary serial of the British science fiction television series Doctor Who. It was first broadcast in the UK in three weekly parts from 23 November 1988, to 7 December 1988....

, "World War Three
World War Three (Doctor Who)
"World War Three" is the fifth episode of the first series in the British science fiction television series Doctor Who that was first broadcast on 23 April 2005. It is the second of a two-part story. The first part, "Aliens of London", was broadcast on 16 April...

", "The Christmas Invasion
The Christmas Invasion
"The Christmas Invasion" is a 60-minute special episode of the British science fiction television series Doctor Who. It is Christmas, but there is little cause for celebration as planet Earth is invaded by aliens known as the Sycorax...

", "Tooth and Claw
Tooth and Claw (Doctor Who)
"Tooth and Claw" is the second episode in the second series of the British science fiction television series Doctor Who and was first broadcast on 22 April 2006. In 1879 Scotland, the Doctor and Rose meet Queen Victoria...

", "The Age of Steel
The Age of Steel
"The Age of Steel" is an episode of the British science fiction television series Doctor Who. It was first broadcast on 20 May 2006 and is the second part of a two-part story that was the first to feature the Cybermen since Silver Nemesis in 1988. The first part, "Rise of the Cybermen", was...

", "The Runaway Bride
The Runaway Bride (Doctor Who)
"The Runaway Bride" is a special episode of the long-running British science fiction television series Doctor Who, starring David Tennant as the Tenth Doctor...

", "Smith and Jones
Smith and Jones (Doctor Who)
"Smith and Jones" is the first episode of the third series of the British science fiction television series Doctor Who. It was first broadcast on BBC One on 31 March 2007. It sees the debut of Freema Agyeman as new companion Martha Jones...

" and most notably in Remembrance of the Daleks
Remembrance of the Daleks
Remembrance of the Daleks is a serial in the British science fiction television series Doctor Who, which was first broadcast in four weekly parts from 5 October to 26 October 1988....

when he arranges for the planet Skaro
Skaro
Skaro is a fictional planet from the British science fiction television series Doctor Who created by the writer Terry Nation as the home planet of the Daleks and, at times, the centre of the Dalek Empire....

 to be destroyed; it has also been stated that he was responsible for destroying both the Dalek and Time Lord races in order to end the Time War
Time War (Doctor Who)
The Time War, more specifically called The Last Great Time War, is a conflict within the fictional universe of the long-running British science fiction television series Doctor Who...

 numerous times in the series beginning in 2005. Another example of the Doctor purposely taking a life is The Sontaran Experiment
The Sontaran Experiment
The Sontaran Experiment is a serial in the British science fiction television series Doctor Who, which was originally broadcast in two weekly parts on 22 February and 1 March 1975.-Synopsis:...

, where he tells his companion Harry Sullivan to remove a device from the Sontaran ship, which causes the death of the Sontaran, something the Doctor knew would happen but Harry did not. In the 2005 episode "The End of the World
The End of the World (Doctor Who)
"The End of the World" is the second episode of Series One of the British science-fiction television series Doctor Who. Written by show runner Russell T Davies and directed by Euros Lyn, the episode was first broadcast on 2 April 2005....

", the Doctor teleports Cassandra back onto the ship and does nothing to prevent her death, even ignoring her cries for help and pity. In situations where fixed points in history must be preserved, the Doctor is sometimes faced with hard choices resulting in the deaths of many; In The Visitation he started the Great Fire of London, and in The Fires of Pompeii
The Fires of Pompeii
"The Fires of Pompeii" is the second episode of the fourth series of the British science fiction television series Doctor Who. It was broadcast on BBC One on 12 April 2008....

he caused the volcano above Pompeii to erupt, which killed everyone in the city (but saved the rest of the world). On other occasions he is seen to be critical of others who use deadly force, such as his companions Leela
Leela (Doctor Who)
Leela is a fictional character played by Louise Jameson in the long-running British science fiction television series Doctor Who. Leela was a companion of the Fourth Doctor and a regular in the programme from 1977 to 1978...

 in The Face of Evil
The Face of Evil
The Face of Evil is a serial in the British science fiction television series Doctor Who. This serial starred Tom Baker as the Doctor and was the fourth story in Series 14 of Doctor Who. First broadcast in four weekly parts from January 1 to January 22, 1977...

and Talons of Weng-Chiang, or Jack Harkness
Jack Harkness
Captain Jack Harkness is a fictional character played by John Barrowman in Doctor Who and its spin-off series, Torchwood. He first appeared in the 2005 Doctor Who episode "The Empty Child" and reappeared in the remaining episodes of the 2005 series as a companion of the ninth incarnation of the...

 in "Utopia
Utopia (Doctor Who)
"Utopia" is an episode of the British science fiction television series Doctor Who. It was broadcast on BBC One on 16 June 2007 and is the eleventh episode of series three of the revived Doctor Who series...

".

The Doctor has an extreme dislike for weapons such as firearms or rayguns and will often decline to use them even when they are convenient. He has proven capable of using them effectively when necessary, as seen in Resurrection of the Daleks
Resurrection of the Daleks
Resurrection of the Daleks is a serial in the British science fiction television series Doctor Who, which was first broadcast in two weekly parts between 8 February and 15 February 1984...

and Revelation of the Daleks
Revelation of the Daleks
Revelation of the Daleks is a serial in the British science fiction television series Doctor Who, which was first broadcast in two weekly parts on 23 March and 30 March 1985...

. He will occasionally use a firearm as a convenient way to bluff his way through a situation, hoping that his foe will not suspect that he does not intend to shoot. He will also occasionally present non-threatening items as weapons so as to fool his enemies, and buy himself time (such as threatening to kill a tribesman with a "deadly jelly baby" in The Face of Evil
The Face of Evil
The Face of Evil is a serial in the British science fiction television series Doctor Who. This serial starred Tom Baker as the Doctor and was the fourth story in Series 14 of Doctor Who. First broadcast in four weekly parts from January 1 to January 22, 1977...

, brandishing a water pistol in The Fires of Pompeii
The Fires of Pompeii
"The Fires of Pompeii" is the second episode of the fourth series of the British science fiction television series Doctor Who. It was broadcast on BBC One on 12 April 2008....

, or pretending a Jammie Dodger
Jammie Dodgers
Jammie Dodgers are a popular British biscuit, made from shortbread and plum jam. They are produced by Burton's Foods at its factory in Cwmbran.-Varieties:According to the Burton's Foods web site, Jammie Dodgers are made in the following varieties:...

 to be a Tardis self-destruct device in "Victory of the Daleks
Victory of the Daleks
"Victory of the Daleks" is the third episode in the fifth series of British science fiction television series Doctor Who. It is written by Mark Gatiss and first broadcast on BBC One on 17 April 2010....

").

The Doctor has a deep sense of right and wrong, and a conviction that it is right to intervene when injustice occurs, which sets him apart from his own people, the Time Lord
Time Lord
The Time Lords are an ancient extraterrestrial race and civilization of humanoids in the British science fiction television series Doctor Who, of which the series' eponymous protagonist, the Doctor, is a member...

s, and their strict ethic of non-intervention.

Although throughout his regenerations the Doctor remains essentially the same person, each actor has purposely imbued his incarnation of the role with distinct quirks and characteristics and the production teams purposefully dictate new personality traits for each actor to portray.

Accent

Different actors have used different regional accents
Regional accents of English speakers
The regional accents of English speakers show great variation across the areas where English is spoken as a first language. This article provides an overview of the many identifiable variations in pronunciation, usually deriving from the phoneme inventory of the local dialect, of the local variety...

 in the role. The first six Doctors spoke in Received Pronunciation
Received Pronunciation
Received Pronunciation , also called the Queen's English, Oxford English or BBC English, is the accent of Standard English in England, with a relationship to regional accents similar to the relationship in other European languages between their standard varieties and their regional forms...

 or "BBC English", as was standard on British television at the time. Sylvester McCoy used a very mild version of his own Scottish accent in the role, and Paul McGann
Paul McGann
Paul McGann is an English actor who made his name on the BBC serial The Monocled Mutineer, in which he played the lead role...

 spoke with a faint Liverpudlian
Scouse
Scouse is an accent and dialect of English found primarily in the Metropolitan county of Merseyside, and closely associated with the city of Liverpool and the adjoining urban areas such as the boroughs of south Sefton, Knowsley and the Wirral...

 lilt. Only rarely is this even addressed in the series. In the case of the Eighth Doctor
Eighth Doctor
The Eighth Doctor is the eighth incarnation of the protagonist of the long-running BBC television science-fiction series Doctor Who. He was portrayed by Paul McGann...

, who is identified by American characters as "British," he seems only slightly conscious of the way he sounds, responding with "yes, I suppose I am." When the Ninth Doctor's accent is clearly described as "Northern
Northern English
Northern English is a group of dialects of the English language. It includes the North East England dialects, which are similar in some respects to Scots....

," he responds with the line "lots of planets have a North."

Another example is in The Tomb of the Cybermen
The Tomb of the Cybermen
The Tomb of the Cybermen is a serial in the British science fiction television series Doctor Who that originally aired in four weekly parts from September 2 to September 23, 1967 and is the earliest serial starring Patrick Troughton as the Second Doctor to exist in its entirety...

when the Doctor is identified as "English" and, dissembling, plays along. Though David Tennant speaks with a natural Scottish accent, he played the Tenth Doctor
Tenth Doctor
The Tenth Doctor is the tenth incarnation of the protagonist of the long-running BBC television science-fiction series Doctor Who. He is played by David Tennant, who appears in three series, as well as eight specials...

 with an Estuary
Estuary English
Estuary English is a dialect of English widely spoken in South East England, especially along the River Thames and its estuary. Phonetician John C. Wells defines Estuary English as "Standard English spoken with the accent of the southeast of England"...

 accent (apart from when, in the Highlands
Scottish Highlands
The Highlands is an historic region of Scotland. The area is sometimes referred to as the "Scottish Highlands". It was culturally distinguishable from the Lowlands from the later Middle Ages into the modern period, when Lowland Scots replaced Scottish Gaelic throughout most of the Lowlands...

-set episode "Tooth and Claw
Tooth and Claw (Doctor Who)
"Tooth and Claw" is the second episode in the second series of the British science fiction television series Doctor Who and was first broadcast on 22 April 2006. In 1879 Scotland, the Doctor and Rose meet Queen Victoria...

" the character is pretending to be a local). According to producer Russell T Davies, this was intended as a consequence of spending so much time with Rose. "The Christmas Invasion" would have alluded to this, but the line was cut. Davies also said that after Eccleston's accent, he did not want Tennant "touring the regions" with a Scottish one, and so asked Tennant to affect the same accent he used for the earlier BBC period drama Casanova
Casanova (2005 TV serial)
Casanova is a 2005 British television comedy drama serial, written by television scriptwriter Russell T Davies and directed by Sheree Folkson...

.

In the Big Finish
Big Finish Productions
Big Finish Productions is a British company that produces books and audio plays based, primarily, on cult British science fiction properties...

audio adventure The Sirens of Time
The Sirens of Time
The Sirens of Time is the first Big Finish Productions audio drama based on the long-running British science fiction television series Doctor Who. The story was written by Nicholas Briggs and stars Peter Davison, Colin Baker and Sylvester McCoy...

the captain aboard a German U-boat assumes he is English because of the way he pronounces his words.

Changing fashions

The Doctor's clothing has been equally distinctive, from the distinguished Edwardian
Edwardian period
The Edwardian era or Edwardian period in the United Kingdom is the period covering the reign of King Edward VII, 1901 to 1910.The death of Queen Victoria in January 1901 and the succession of her son Edward marked the end of the Victorian era...

 suits of the First Doctor to the Second Doctor's rumpled, clownlike Chaplinesque
Charlie Chaplin
Sir Charles Spencer "Charlie" Chaplin, KBE was an English comic actor, film director and composer best known for his work during the silent film era. He became the most famous film star in the world before the end of World War I...

 attire to the dandy-esque frills and velvet of the Third Doctor's era. The Fourth Doctor's long frock coat, loose fitting trousers, occasionally worn wide-brimmed hat and trailing, multistriped scarf added to his somewhat shambolic and bohemian image; the Fifth's Edwardian cricket
Cricket
Cricket is a bat-and-ball game played between two teams of 11 players on an oval-shaped field, at the centre of which is a rectangular 22-yard long pitch. One team bats, trying to score as many runs as possible while the other team bowls and fields, trying to dismiss the batsmen and thus limit the...

eer's outfit suited his youthful, aristocratic air as well as his love of the sport (with a stick of celery
Celery
Apium graveolens is a plant species in the family Apiaceae commonly known as celery or celeriac , depending on whether the petioles or roots are eaten: celery refers to the former and celeriac to the latter. Apium graveolens grows to 1 m tall...

 on the lapel for an eccentric touch); and the Sixth's multicoloured jacket, with its cat-shaped lapel pins, reflected the excesses of 1980s fashion. The Seventh Doctor's outfit—a straw hat, a coat with two scarves, a tie, checked trousers and brogues/wingtips—was more subdued and suggestive of a showman, reflecting his whimsical approach to life. In later seasons, as his personality grew more mysterious, his jacket, tie, and hatband all grew darker.

Throughout the 1980s, question mark
Question mark
The question mark , is a punctuation mark that replaces the full stop at the end of an interrogative sentence in English and many other languages. The question mark is not used for indirect questions...

s formed a constant motif, usually on the shirt collars or, in the case of the Seventh Doctor, on his sleeveless jumper and the handle to his umbrella. The idea was grounded in branding considerations, as was the movement starting in Tom Baker's final season toward an unchanging costume for each Doctor, rather than the variants on a theme employed over the first seventeen years of the programme. When the Eighth Doctor regenerated, he clad himself in a 19th century frock coat and shirt based around a Wild Bill Hickok
Wild Bill Hickok
James Butler Hickok , better known as Wild Bill Hickok, was a folk hero of the American Old West. His skills as a gunfighter and scout, along with his reputation as a lawman, provided the basis for his fame, although some of his exploits are fictionalized.Hickok came to the West as a stagecoach...

 costume, reminiscent of the out-of-time quality of earlier Doctors and emphasising the Eighth Doctor's more Romantic
Romanticism
Romanticism was an artistic, literary and intellectual movement that originated in the second half of the 18th century in Europe, and gained strength in reaction to the Industrial Revolution...

 persona.

In contrast to the more flamboyant outfits of his predecessors, the Ninth Doctor wore a nondescript, worn black leather jacket, V-neck jumper and dark trousers. Eccleston stated that he felt that such definitive "costumes" were passé and that the character's trademark eccentricities should show through their actions and clever dialogue, not through gimmicky costumes. Despite this, there is a running joke about his character that the only piece of clothing he changes is his jumper, even when trying to "blend into" a historical era. The one exception, a photograph of him taken in 1912, wearing period gentleman's clothing, resembles the style of the Eighth Doctor.

The Tenth Doctor sports either a blue or a brown pinstripe suit – usually worn with ties – a tan ankle-length coat and Converse trainers, the latter recalling the plimsoll
Plimsoll shoe
A plimsoll shoe, plimsoll, or plimsole is a British English word for a type of athletic shoe with a canvas upper and rubber sole, developed as beachwear in the 1830s by the Liverpool Rubber Company. The shoe was originally, and often still is in parts of the United Kingdom, called a 'sand shoe' and...

s worn by his fifth incarnation. Also like that incarnation (and his first one), he occasionally wears spectacles: a pair with black, thick-rimmed frames. In the 2007 Children in Need special he states that he doesn't actually need glasses to see, but rather wears them to "look a bit clever." On some occasions he wears a black tuxedo
Tuxedo
A tuxedo is a type of semi-formal dress for men.Tuxedo may also refer to:-Places:Canada* Tuxedo, Winnipeg, Manitoba, a city neighborhood** Tuxedo , a provincial electoral district in Manitoba...

 with matching black trainers. In interviews, Tennant has referred to his Doctor's attire as geek chic
Geek Chic
Geek Chic: The Ultimate Guide to Geek Culture is a book co-written by Neil Feinman, Rob Davis and Chelseah Kalberloh. The book charts the history of the geek from Ancient Greece to the Xbox. It is published by Thames and Hudson , BIS Publishing and Ginko Press ....

. According to Tennant he had always wanted to wear the trainers. The overall costume, however, was influenced by an outfit worn by Jamie Oliver
Jamie Oliver
James "Jamie" Trevor Oliver, MBE , sometimes known as The Naked Chef, is an English chef, restaurateur and media personality, known for his food-focused television shows, cookbooks and more recently his campaign against the use of processed foods in national schools...

 in a TV interview on the talk show Parkinson
Parkinson (TV series)
Parkinson is a British television talk show that was presented by Sir Michael Parkinson. It was first shown on the BBC from 1971 to 2004, and on ITV from 2004 to 2007.-Background:...

.

The Tenth Doctor says in "The Runaway Bride
The Runaway Bride (Doctor Who)
"The Runaway Bride" is a special episode of the long-running British science fiction television series Doctor Who, starring David Tennant as the Tenth Doctor...

" that, like the TARDIS, his pockets are bigger on the inside. The Second, Fourth, Sixth, Seventh and Eleventh Doctors routinely carried numerous items in their coats without this being conspicuous.

The Eleventh Doctor's appearance has been described as appearing like "an Oxford professor", with a tweed
Tweed (cloth)
Tweed is a rough, unfinished woolen fabric, of a soft, open, flexible texture, resembling cheviot or homespun, but more closely woven. It is made in either plain or twill weave and may have a check or herringbone pattern...

 jacket, red or blue striped shirt, red or blue bow tie
Bow tie
The bow tie is a type of men's necktie. It consists of a ribbon of fabric tied around the collar in a symmetrical manner such that the two opposite ends form loops. Ready-tied bow ties are available, in which the distinctive bow is sewn into shape and the band around the neck incorporates a clip....

, black or grey trousers with red or blue braces, and black boots. He maintains "Bow ties are cool" even when his companions do not agree, and is delighted to meet Dr Black, the first man who agrees with him, in the episode "Vincent and the Doctor
Vincent and the Doctor
"Vincent and the Doctor" is the 10th episode in the fifth series of British science fiction television series Doctor Who, which was first broadcast on 5 June 2010...

". As a running gag, he exhibits attraction to unusual hats, like a fez and a stetson
Stetson
Stetsons are the brand of hat manufactured by the John B. Stetson Company of St. Joseph, Missouri.Stetson eventually became the world’s largest hat maker, producing over 3.3 million hats a year in a factory spread over . Today Stetson remains a family-owned concern...

, only to have them destroyed by River Song
River Song
"River Song" may refer to:* "River Song" , the opening track of Dennis Wilson's 1977 album Pacific Ocean Blue* River Song , a recurring character in the Doctor Who TV series...

 shortly afterwards. Another time he liked an unusual hat was when he visited a pirate ship in the 17th century and took a hat left behind by one of the pirates taken by the Siren.

Transitions

Save for the off-screen transition between the Eighth and Ninth Doctors, to date each regeneration has been worked into the continuing story. Also, most regenerations (save the Second-to-Third and Eighth-to-Ninth transitions) have been portrayed on-screen, in a handing over of the role. The following list details the manner of each regeneration:
  1. First Doctor (William Hartnell): Frail and steadily growing weaker throughout The Tenth Planet
    The Tenth Planet
    The Tenth Planet is a serial in the British science fiction television series Doctor Who, which was first broadcast in four weekly parts from 8 October to 29 October 1966. It was William Hartnell's last regular appearance as the First Doctor, and the first story to feature the Cybermen...

    , the doctor collapses at the serial's end.
  2. Second Doctor (Patrick Troughton): a forced "change in appearance" and exile to Earth by the Time Lords in the closing moments of The War Games
    The War Games
    The War Games is a serial in the British science fiction television series Doctor Who, which originally aired in ten weekly parts from 19 April to 21 June 1969. It was the last regular appearance of Patrick Troughton as the Second Doctor, and of Wendy Padbury and Frazer Hines as companions Zoe...

    .
  3. Third Doctor (Jon Pertwee): radiation poisoning from the Great One's cave of crystals on the planet Metabilis 3 at the end of Planet of the Spiders
    Planet of the Spiders
    Planet of the Spiders is a serial in the British science fiction television series Doctor Who, which was first broadcast in six weekly parts from May 4 to June 8, 1974. It was Jon Pertwee's last serial as the Doctor and marks the first, uncredited appearance of Tom Baker in the role. It also marks...

    .
  4. Fourth Doctor (Tom Baker): fell from the Pharos Project radio telescope in Logopolis
    Logopolis
    Logopolis is a serial in the British science fiction television series Doctor Who, which was first broadcast in four weekly parts from 28 February to 21 March 1981. It was Tom Baker's last story as the Doctor and marks the first appearance of Peter Davison in the role...

    and was assisted in the regeneration by a mysterious "in-between" incarnation identified as "The Watcher".
  5. Fifth Doctor (Peter Davison): spectrox toxaemia poisoning, contracted near the start of The Caves of Androzani
    The Caves of Androzani
    The Caves of Androzani is a serial in the British science fiction television series Doctor Who, which was first broadcast in four twice-weekly parts from 8–16 March 1984. It was Peter Davison's last regular appearance as the Doctor, and marks the first appearance of Colin Baker in the role...

    .
  6. Sixth Doctor (Colin Baker): suffered great injuries when the Rani
    Rani (Doctor Who)
    The Rani is a fictional character in the British science fiction television series Doctor Who. She was played by Kate O'Mara. The word "Rani" means "queen" in the Urdu and Hindi languages and "The Rani" follows the naming convention for other renegade timelords, "The Doctor," "The Monk," "The War...

     attacked the TARDIS and caused it to crash land at the start of Time and the Rani
    Time and the Rani
    Time and the Rani is a serial in the British science fiction television series Doctor Who, which was first broadcast in four weekly parts from 7 September to 28 September 1987. This story was the first to feature Sylvester McCoy as the Doctor. It also features the last appearance of the Sixth...

    .
  7. Seventh Doctor (Sylvester McCoy): died in San Francisco during exploratory heart surgery by a doctor unfamiliar with Time Lord physiology, after being hospitalised for non-life threatening gunshot wounds in the 1996 television movie.
  8. Eighth Doctor (Paul McGann): unknown cause of death.
  9. Ninth Doctor (Christopher Eccleston): cellular degeneration caused by absorbing the energies of the time vortex
    Time vortex (Doctor Who)
    In the science fiction television series Doctor Who, the time vortex is the medium that the TARDIS and other time machines travel through...

     from Rose Tyler
    Rose Tyler
    Rose Marion Tyler is a fictional character portrayed by Billie Piper in the long-running British science fiction television series Doctor Who, and was created by series producer Russell T Davies...

    , which she in turn had absorbed through the heart of the TARDIS
    TARDIS
    The TARDISGenerally, TARDIS is written in all upper case letters—this convention was popularised by the Target novelisations of the 1970s...

     in "The Parting of the Ways
    The Parting of the Ways
    "The Parting of the Ways" is an episode in the British science fiction television series Doctor Who, which was first broadcast on 18 June 2005. It was the second episode of the two-part story that featured Christopher Eccleston making his last appearance as the Ninth Doctor...

    ".
  10. Tenth Doctor (David Tennant): radiation poisoning
    Radiation poisoning
    Acute radiation syndrome also known as radiation poisoning, radiation sickness or radiation toxicity, is a constellation of health effects which occur within several months of exposure to high amounts of ionizing radiation...

     incurred while saving the life of Wilfred Mott
    Wilfred Mott
    Wilfred "Wilf" Mott is a recurring fictional character in the British science fiction television series Doctor Who, played by Bernard Cribbins. He is the maternal grandfather of the Tenth Doctor's companion Donna Noble, and father of character Sylvia Noble...

     in The End of Time
    The End of Time
    The End of Time: The Next Revolution in Our Understanding of the Universe, also sold with the alternate subtitle The Next Revolution in Physics, is a 1999 science book in which the author Julian Barbour argues that time exists merely as an illusion.-Auto-biography:The book begins by describing how...

    .


Only the Doctor's first regeneration (Hartnell to Troughton) occurs due to natural causes – the Doctor is showing increasing signs of age, and comments that his body is "wearing a bit thin". Every other regeneration is caused by some external factor, such as radiation poisoning, infection or fatal injuries.

In the original series, with the exception of the change from Troughton to Pertwee, regeneration usually occurred when the previous Doctor was near "death". The changeover from McCoy to McGann was handled differently, with the Doctor actually dying and being dead for quite some time before regeneration occurred. The Eighth Doctor comments at one point in the television movie that the anaesthesia interfered with the regenerative process, and that he had been "dead too long", accounting for his initial amnesia
Amnesia
Amnesia is a condition in which one's memory is lost. The causes of amnesia have traditionally been divided into categories. Memory appears to be stored in several parts of the limbic system of the brain, and any condition that interferes with the function of this system can cause amnesia...

. Kate Orman
Kate Orman
Kate Orman is an Australian author, best known for her books connected to the British science-fiction television series Doctor Who.-Biography:...

's novel The Room with No Doors
The Room With No Doors
The Room With No Doors is an original novel written by Kate Orman and based on the long-running British science fiction television series Doctor Who. It features the Seventh Doctor and Chris....

, set just before the regeneration, also notes that this is one of the few regenerations in which the Doctor was not conscious and aware that he was dying.

The 2005 series began with the Ninth Doctor already regenerated and fully stabilised, with no explanation given. In his first appearance in "Rose", the Doctor looked in a mirror and commented on the size of his ears, suggesting to some viewers that the regeneration may have happened shortly prior to the episode, or that he has not examined himself in the mirror recently. Some draw the conclusion that the Ninth Doctor's appearances in old photographs, without being accompanied by Rose, may also suggest that he had been regenerated for some time, but these appearances could have also occurred afterwards. Russell T Davies, writer/producer of the new series, stated in Doctor Who Magazine
Doctor Who Magazine
Doctor Who Magazine is a magazine devoted to the long-running British science fiction television series Doctor Who...

that he has no intention of showing the regeneration in the series, and that he believed the story of how the Eighth Doctor became the Ninth is best told in other media. In Doctor Who Confidential
Doctor Who Confidential
Doctor Who Confidential is a documentary series created by the British Broadcasting Corporation to complement the revival of the long-running British science fiction television series Doctor Who. Each episode was broadcast on BBC Three on Saturdays, immediately after the broadcast of the weekly...

Davies revealed his reasoning that, after such a long hiatus, a regeneration in the first episode would not just be confusing for new viewers but also lack dramatic impact, as there would be no emotional investment in the character before he was replaced.

Regenerations

It was established in The Deadly Assassin
The Deadly Assassin
The Deadly Assassin is a serial in the British science fiction television series Doctor Who, which was first broadcast in four weekly parts from 30 October to 20 November 1976...

(1976) that a Time Lord can regenerate twelve times before permanently dying – a total of thirteen incarnations. In the 1996 television movie the Eighth Doctor explicitly said that a Time Lord has "thirteen lives". (The Doctor's enemy, The Master
Master (Doctor Who)
The Master is a recurring character in the British science fiction television series Doctor Who. He is a renegade Time Lord and the archenemy of the Doctor....

 has, however, been shown circumventing this limit on several occasions.) In Death of the Doctor
Death of the Doctor
Death of the Doctor is a two-part story of The Sarah Jane Adventures which was broadcast on CBBC on 25 and 26 October 2010. It is the third story of the fourth series. This episode features the return of Katy Manning to the role of Jo Grant and a guest appearance by Matt Smith as the Eleventh Doctor...

(a 2010 episode of The Sarah Jane Adventures
The Sarah Jane Adventures
The Sarah Jane Adventures is a British science fiction television series, produced by BBC Cymru Wales for CBBC, created by Russell T Davies and starring Elisabeth Sladen...

), the Eleventh Doctor indicated to Clyde Langer
Clyde Langer
Clyde Langer is a fictional character played by Daniel Anthony in the British children's science fiction television programme The Sarah Jane Adventures...

 that he could regenerate 507 times. Early news reports, before the episode was broadcast, suggested he would say there is no limit to the number of regenerations. However the Doctor may have been joking with Clyde, and writer Russell T. Davies has confirmed that the line was not intended to be taken seriously.

In "The Christmas Invasion
The Christmas Invasion
"The Christmas Invasion" is a 60-minute special episode of the British science fiction television series Doctor Who. It is Christmas, but there is little cause for celebration as planet Earth is invaded by aliens known as the Sycorax...

" it was stated the regenerative cycle creates a large amount of energy that suffuses the Time Lord's body. As demonstrated by the Tenth Doctor for the first time in that story, in the first fifteen hours of regeneration this energy is enough to even rapidly regrow a severed hand. This is in keeping with earlier serials, such as Robot
Robot (Doctor Who)
Robot is a serial in the British science fiction television series Doctor Who, which was first broadcast in four weekly parts from 28 December 1974 to 18 January 1975...

, where the newly-regenerated Fourth Doctor splits a brick with his bare hand, and also in the 1996 television movie, where the Doctor is depicted battering down a heavy steel door in a hospital morgue.

The Doctor's regenerations are usually a result of his previous incarnation sustaining mortal injury or (in one case) having a change forced on him by the Time Lords. Other Time Lord regenerations, like Romana
Romana
Romana, short for Romanadvoratrelundar, is a fictional character in the long-running British science fiction television series Doctor Who...

's, have not been as dramatic or painful.

The Doctor frequently experiences a period of instability and partial amnesia
Amnesia
Amnesia is a condition in which one's memory is lost. The causes of amnesia have traditionally been divided into categories. Memory appears to be stored in several parts of the limbic system of the brain, and any condition that interferes with the function of this system can cause amnesia...

 following regeneration. Some post-regeneration experiences have been more difficult than others. In particular, the Fifth Doctor began reverting to his previous personalities and required the healing powers of the TARDIS's "Zero Room" to recuperate (Castrovalva). The Sixth Doctor experienced extreme paranoia
Paranoia
Paranoia [] is a thought process believed to be heavily influenced by anxiety or fear, often to the point of irrationality and delusion. Paranoid thinking typically includes persecutory beliefs, or beliefs of conspiracy concerning a perceived threat towards oneself...

 and flew into a murderous rage, nearly killing his companion (The Twin Dilemma
The Twin Dilemma
The Twin Dilemma is a serial in the British science fiction television series Doctor Who, which was first broadcast in four twice-weekly parts from 22 March to 30 March 1984, the first to star Colin Baker in the title role.-Synopsis:...

). The Eighth Doctor experienced amnesia (1996 Doctor Who television movie) however this particular episode of amnesia was brought on as an adverse reaction by his alien physiology to the anaesthetics used by the surgeons attempting to save his life.

The regeneration from Eighth to Ninth Doctors has never yet been revealed on film or television. The regeneration from the Ninth to the Tenth Doctor at first seemed smooth, with the Doctor regenerating standing up for the first time ("The Parting of the Ways
The Parting of the Ways
"The Parting of the Ways" is an episode in the British science fiction television series Doctor Who, which was first broadcast on 18 June 2005. It was the second episode of the two-part story that featured Christopher Eccleston making his last appearance as the Ninth Doctor...

"). However, shortly thereafter he began to experience spasms and became somewhat manic, frightening his companion as he pushed the TARDIS to dangerous extremes (Children in Need mini-episode
Doctor Who: Children in Need
"Doctor Who: Children in Need", also known as "Born Again", is a 7-minute mini-episode of the British science fiction television series Doctor Who...

). After crash-landing the TARDIS, the Doctor collapsed and remained unconscious for most of the next fifteen hours ("The Christmas Invasion
The Christmas Invasion
"The Christmas Invasion" is a 60-minute special episode of the British science fiction television series Doctor Who. It is Christmas, but there is little cause for celebration as planet Earth is invaded by aliens known as the Sycorax...

"). The experience was traumatic enough to cause one of his hearts to temporarily stop beating.

The newly regenerated Tenth Doctor was able to regrow his hand when it was severed at the wrist during a swordfight with the Sycorax leader. This ability had never been exhibited before.

The TARDIS also appears to aid in the regenerative process. Of the four occasions the Doctor regenerates outside the TARDIS, three are initiated by Time Lords: one forced on him before banishment to Earth (The War Games), one requiring a Time Lord to give the Doctor's cells a "little push" to start the process (Planet of the Spiders), and one needing the Watcher, which the Doctor's travelling companions believed to be some version of the Doctor himself (Logopolis). The fourth apparently occurred a few hours after he had actually "died", leaving him with temporary amnesia (the 1996 television movie) due to his body's adverse reaction to earth medicines.

In "Journey's End
Journey's End (Doctor Who)
"Journey's End" is the thirteenth episode of the fourth series of British science fiction television series Doctor Who first broadcast on BBC One on 5 July 2008. It is the second episode of a two-part crossover story featuring the characters of spin-off shows Torchwood and The Sarah Jane...

", the Tenth Doctor
Tenth Doctor
The Tenth Doctor is the tenth incarnation of the protagonist of the long-running BBC television science-fiction series Doctor Who. He is played by David Tennant, who appears in three series, as well as eight specials...

 manages to avert his own regeneration, using some of the energy to heal himself then channelling the remaining energy into his severed hand, thus retaining his appearance and personality. The question of whether this partial regeneration process uses up one of this thirteen incarnations is left open. Later in the episode, the energy left over from the regeneration forms a "new" Doctor when Donna Noble
Donna Noble
Donna Noble is a fictional character played by Catherine Tate in the long-running British science fiction television series Doctor Who. A secretary from Chiswick, London, she is a companion of the Tenth Doctor, appearing in one scene at the end of the final episode of the 2006 series,...

 inadvertently causes a "human-time lord biological metacrisis". This Doctor is part Time Lord and part human, possessing the Doctor's memories and physical appearance but also inheriting some of Donna Noble
Donna Noble
Donna Noble is a fictional character played by Catherine Tate in the long-running British science fiction television series Doctor Who. A secretary from Chiswick, London, she is a companion of the Tenth Doctor, appearing in one scene at the end of the final episode of the 2006 series,...

's personality traits. The part-human Doctor also has only one heart, ages like a human, and cannot regenerate. At the same time, the residual energy imbues Donna with the vast intellect of a Time Lord. However, the knowledge is too much for her human mind to handle and at the end of the episode the Doctor has to block all her memories of her time with him to save her life.

The End of Time
The End of Time
The End of Time: The Next Revolution in Our Understanding of the Universe, also sold with the alternate subtitle The Next Revolution in Physics, is a 1999 science book in which the author Julian Barbour argues that time exists merely as an illusion.-Auto-biography:The book begins by describing how...

finally shows the Tenth Doctor fully regenerating into the Eleventh Doctor
Eleventh Doctor
The Eleventh Doctor is the eleventh incarnation of the protagonist of the BBC television science-fiction series Doctor Who. Matt Smith plays this incarnation, replacing David Tennant's Tenth Doctor in the 2010 episode "The End of Time, Part Two"...

, in a particularly violent fashion that causes severe damage to the TARDIS. The reason for this, where previous regenerations have not been shown to affect the TARDIS at all, has yet to be revealed.

"The Impossible Astronaut
The Impossible Astronaut
"The Impossible Astronaut" is the first episode of the sixth series of the British science fiction television series Doctor Who. Written by show runner Steven Moffat, and directed by Toby Haynes, the episode was first broadcast on 23 April 2011 in the United Kingdom, as well as the United States...

" shows the Eleventh Doctor starting to regenerate after being attacked by the eponymous astronaut, but the regeneration is interrupted with a second attack and the Doctor is killed as a result. However, it was later revealed that it was actually the Teselecta ship impersonating the Doctor that was shot, not the Doctor himself.

Continuity curiosities

Over the years, different writers and production teams have introduced their own twists to the Doctor's character, sometimes as part of a grand creative reinvention; others, out of narrative convenience or outside pressures. Without one driving vision to maintain continuity, newer details may occasionally seem to contradict earlier ones. Other details—sometimes significant ones—are later ignored, sometimes leading to argument amongst series fans as to how, or whether, these details apply in a broader context.

In the early serials The Edge of Destruction
The Edge of Destruction
The Edge of Destruction is a serial in the British science fiction television series Doctor Who, which was first broadcast in two weekly parts on February 8 and February 15, 1964. The serial is distinguished as a rare "bottle episode", in that the entire story is shot on a single set, with just...

and The Sensorites
The Sensorites
The Sensorites is a serial in the British science fiction television series Doctor Who, which was first broadcast in six weekly parts from June 20 to August 1, 1964. The story is notable for its early demonstration of Susan's telepathy and references to the Doctor and her home planet.-Plot:The...

, it appeared that the First Doctor had only a single heart. The novel The Man in the Velvet Mask
The Man in the Velvet Mask
The Man in the Velvet Mask is an original novel written by Daniel O'Mahony and based on the long-running British science fiction television series Doctor Who. The novel features the First Doctor and Dodo....

by Daniel O'Mahony suggests that Time Lords only grow their second heart during their first regeneration (speculated earlier by John Peel
John Peel (writer)
John Peel is a British writer, best known for his books connected to several television series. He has written under several pseudonyms, including John Vincent and Nicholas Adams. He lives in Long Island, New York and his wife is a U.S...

 in The Gallifrey Chronicles
The Gallifrey Chronicles (1991 book)
For the Lance Parkin novel of the same name, see: The Gallifrey Chronicles The Gallifrey Chronicles is the title of a book related to the long-running British science fiction television series Doctor Who. Written by John Peel, The Gallifrey Chronicles is an exploration of the fictional history of...

). In The Mind of Evil
The Mind of Evil
The Mind of Evil is a serial in the British science fiction television series Doctor Who, which was first broadcast in six weekly parts from 30 January to 6 March 1971.-Plot:...

, "The Christmas Invasion
The Christmas Invasion
"The Christmas Invasion" is a 60-minute special episode of the British science fiction television series Doctor Who. It is Christmas, but there is little cause for celebration as planet Earth is invaded by aliens known as the Sycorax...

" and "The Shakespeare Code
The Shakespeare Code
"The Shakespeare Code" is an episode of the British science fiction television series Doctor Who. It was broadcast on BBC One on 7 April 2007, and is the second episode of Series 3 of the revived Doctor Who series. According to the BARB figures this episode was seen by 7.23 million viewers and was...

" one of the Doctor's hearts temporarily stops beating due to intense trauma.

Also during his first regeneration, and for similarly unclear reasons, the Doctor's clothes (save for his cloak and ring, both of which quickly thereafter fall off) changed along with his body (The Power of the Daleks
The Power of the Daleks
The Power of the Daleks is a serial in the British science fiction television series Doctor Who, which was first broadcast in six weekly parts from 5 November to 10 December 1966. It is Patrick Troughton's first full story as the Doctor.-Plot:...

); on all subsequent regenerations the new Doctor generally continues to wear the clothing he regenerated in until he selects a new outfit (though the regeneration from the Fourth to the Fifth Doctors included a change of footwear, possibly due to a continuity error).

In The Brain of Morbius
The Brain of Morbius
The Brain of Morbius is a serial in the British science fiction television series Doctor Who, which was first broadcast in four weekly parts from 3 January to 24 January 1976...

(produced shortly before The Deadly Assassin
The Deadly Assassin
The Deadly Assassin is a serial in the British science fiction television series Doctor Who, which was first broadcast in four weekly parts from 30 October to 20 November 1976...

), visual images displayed during a mental battle between the Fourth Doctor and Morbius can be taken as implying that the Doctor had at least eight incarnations prior to the First Doctor. However, multiple dialogue references throughout the series (particularly in The Three Doctors, Mawdryn Undead
Mawdryn Undead
Mawdryn Undead is a serial in the British science fiction television series Doctor Who, which was originally broadcast in four twice weekly parts from 1 February to 9 February 1983...

and The Five Doctors
The Five Doctors
The Five Doctors is a special feature-length episode of the British science fiction television series Doctor Who, produced in celebration of the programme's twentieth anniversary. It had its world premiere in the United States, on the Chicago PBS station WTTW and various other PBS member stations...

) contradict this, as well as the fact that the Doctor has regenerated six times since then (as stated in "School Reunion"). Explanations have included theories that the images were of Morbius's previous incarnations (two images that are certainly Morbius also appear, and the game seems to have a symmetrical arrangement), or false images induced by the Doctor. The Doctor Who novels have suggested that these may have been faces of the Other
Other (Doctor Who)
The Other is a fictional character in the expanded universe of the British science fiction television series Doctor Who. A legendary figure in Time Lord history, the Other does not appear in the television series itself, but is mentioned several times in the spin-off media based on the...

, a figure from Gallifrey's ancient past and the genetic predecessor of the Doctor (although being from the tie-in novels, the canonicity of this character is debatable). The producers, however, intended that these were figures from the Doctor's past. Producer Philip Hinchcliffe has said, "We tried to get famous actors for the faces of the Doctor. But because no one would volunteer, we had to use backroom boys. And it is true to say that I attempted to imply that William Hartnell was not the first Doctor."

In the Sixth Doctor story arc The Trial of a Time Lord
The Trial of a Time Lord
The Trial of a Time Lord is a fourteen-part British science fiction serial of the long running BBC series Doctor Who. The serial, produced as the twenty-third season of the Doctor Who television series, aired in weekly episodes from 6 September to 6 December 1986...

, a Time Lord with the title of the Valeyard
Valeyard
The Valeyard is a fictional character from the long-running British science fiction television series, Doctor Who. He is described as an aspect of the Doctor from between his twelfth and final incarnations as depicted in the TV show or regenerations in the novelization of the story...

 (played by Michael Jayston
Michael Jayston
Michael Jayston is a Nottingham-born English actor.- Early life :He attended the Becket Grammar School in West Bridgford, then worked briefly as a trainee accountant at the offices of the National Coal Board before obtaining a scholarship to the Guildhall School of Music and Drama to train as an...

) was revealed to be a potential future Doctor, a "distillation" created somewhere between his twelfth and final incarnations and embodying all the evil and malevolence of the Doctor's dark side. The Valeyard was defeated in his attempt to actualise himself by stealing the Sixth Doctor's remaining regenerations, however, and so may never actually come to exist.

The idea of an "in-between" version of the Doctor has its precedents. In Planet of the Spiders, a Time Lord's future self (described as a "distillation" of the future incarnation) was shown to exist as a corporeal projection
Tulpa
Tulpa is an upaya concept in Tibetan Buddhism and Bon, discipline and teaching tool. The term was first rendered into English as 'Thoughtform' by Evans-Wentz :...

 that assisted his then-current incarnation. In Logopolis
Logopolis
Logopolis is a serial in the British science fiction television series Doctor Who, which was first broadcast in four weekly parts from 28 February to 21 March 1981. It was Tom Baker's last story as the Doctor and marks the first appearance of Peter Davison in the role...

, an eerie and mysterious white-clad figure known as the Watcher assisted in the transition between the Fourth and Fifth Doctors. Nyssa commented that the Watcher "was the Doctor all the time" as he merged with the supine form of the fourth Doctor, regeneration beginning just before the merging is complete.

Perhaps the most controversial element from the 1996 television movie was the revelation that the Doctor is half-human ("on [his] mother's side"). The spin-off novels and audios have tried various methods to explain this revelation, suggesting that the Doctor retained some human DNA
DNA
Deoxyribonucleic acid is a nucleic acid that contains the genetic instructions used in the development and functioning of all known living organisms . The DNA segments that carry this genetic information are called genes, but other DNA sequences have structural purposes, or are involved in...

 from his time as Dr John Smith (in which the Doctor, using bought technology, became biologically human with a different persona unaware of his Time Lord self) in the Virgin New Adventures
Virgin New Adventures
The Virgin New Adventures were a series of novels from Virgin Publishing based on the British science-fiction television series Doctor Who...

 novel Human Nature, or that his origins have become muddied by agents manipulating his personal timestream (the Eighth Doctor Adventures
Eighth Doctor Adventures
The Eighth Doctor Adventures are a series of spin off novels based on the long running BBC science fiction television series Doctor Who and published under the BBC Books imprint. 73 books were published overall...

 novel Unnatural History
Unnatural History (Doctor Who)
Unnatural History is an original novel written by Jonathan Blum and Kate Orman and based on the long-running British science fiction television series Doctor Who...

), hinting that it is only the Eighth Doctor who is half human, or that only his mother's incarnation at the time of his birth was Human. Kate Orman's novel The Room with No Doors
The Room With No Doors
The Room With No Doors is an original novel written by Kate Orman and based on the long-running British science fiction television series Doctor Who. It features the Seventh Doctor and Chris....

features a time-travelling Victorian lady, Penelope Gate, who later books, such as Unnatural History and The Gallifrey Chronicles
The Gallifrey Chronicles (2005 novel)
For the John Peel book of the same name, see: The Gallifrey Chronicles The Gallifrey Chronicles is a BBC Books original novel written by Lance Parkin and based on the long-running British science fiction television series Doctor Who...

, hint may be the Doctor's mother, but do not elaborate on how this came to pass. In the New Series Adventures
New Series Adventures (Doctor Who)
The New Series Adventures are a series of novels relating to the long-running BBC science fiction television series, Doctor Who. The 'NSAs', as they are often referred to, are published by BBC Books, and are regularly published in the spring and autumn of each year. Beginning and concluding with...

 novel The Deviant Strain
The Deviant Strain
The Deviant Strain is a BBC Books original novel written by Justin Richards and based on the long-running British science fiction television series Doctor Who. It was published on September 8, 2005, alongside Only Human and The Stealers of Dreams. It features the Ninth Doctor, Rose Tyler and...

by Justin Richards, the Doctor comments that his DNA is "close" to that of humans. In the IDW Comics story "The Forgotten", the Eighth Doctor remarks that he simply convinced the Master he was half-human, "with nothing more than a wide-eyed expression, a couple of words, and a half-broken Chameleon Arch." However, as noted above, the canonical nature of the novels and comics is uncertain. The idea of a "half-human" Doctor is further discredited by the 2008 series finale "Journey's End
Journey's End (Doctor Who)
"Journey's End" is the thirteenth episode of the fourth series of British science fiction television series Doctor Who first broadcast on BBC One on 5 July 2008. It is the second episode of a two-part crossover story featuring the characters of spin-off shows Torchwood and The Sarah Jane...

", wherein the Doctor expresses dismay at his "half-human" double, and explicitly states that a human/Time Lord cross such as Donna becomes in that story has never existed before; events later in the episode show the latter combination to be inherently unstable. Furthermore, it was heavily implied by Russell T. Davies that "The Woman" in The End of Time is the Doctor's mother, and she is clearly one of the Time Lords with a vote on the Council. Despite all this, the notion that the Doctor is part human could certainly explain why he has always held such a strong affinity and protective nature towards the human race.

The Time Lord ability to change species during regeneration is referenced by the Eighth Doctor in relation to the Master in the television movie, being supported by Romana's regeneration scene in the 1979 serial Destiny of the Daleks
Destiny of the Daleks
Destiny of the Daleks is a serial in the British science fiction television series Doctor Who, which was first broadcast in four weekly parts from 1 September to 22 September 1979. The story introduces Lalla Ward as the newly-regenerated Romana....

. The Dalek
Dalek
The Daleks are a fictional extraterrestrial race of mutants from the British science fiction television series Doctor Who. Within the series, Daleks are cyborgs from the planet Skaro, created by the scientist Davros during the final years of a thousand-year war against the Thals...

s also implied during the events of The Daleks' Master Plan
The Daleks' Master Plan
The Daleks' Master Plan is a serial in the British science fiction television series Doctor Who. The twelve episodes were aired from 13 November 1965 to 29 January 1966...

(1965–66) that the First Doctor's humanoid form is not his actual appearance. The new series has not made any allusions to mixed parentage, simply referring to the Doctor as "alien" or "Time Lord". However, the trade paperback Doctor Who: The Legend Continues by Justin Richards
Justin Richards
Justin Richards is a British writer. He has written science fiction and fantasy novels, including series set in Victorian or early-20th-century London, and also adventure stories set in the present day...

, published to coincide with the new series, refers to the Doctor as half-human. The 2007 Tenth Doctor episodes "Human Nature
Human Nature (Doctor Who episode)
"Human Nature" is the eighth episode of the third series of the revived British science fiction television series Doctor Who. It is the first episode of a two-part story written by Paul Cornell adapted from his 1995 Doctor Who novel Human Nature...

" and "The Family of Blood
The Family of Blood
"The Family of Blood" is the ninth episode of Series 3 of the British science fiction television series Doctor Who. Preceded by "Human Nature", it is the second episode of a two-part story written by Paul Cornell adapted from his 1995 Doctor Who novel Human Nature...

", adapted from the above-mentioned Seventh Doctor novel, Human Nature, also show the Doctor using technology to become biologically human, although he does so through Time Lord science. Later, in "Utopia
Utopia (Doctor Who)
"Utopia" is an episode of the British science fiction television series Doctor Who. It was broadcast on BBC One on 16 June 2007 and is the eleventh episode of series three of the revived Doctor Who series...

", the Master is revealed to have undergone the same process.

When incarnations meet

Due to time travel, it is possible for the Doctor's various incarnations to encounter and interact with each other, although this is supposed to be prohibited by the First Law of Time (as stated in The Three Doctors) or permitted only in the "gravest of emergencies" (The Five Doctors
The Five Doctors
The Five Doctors is a special feature-length episode of the British science fiction television series Doctor Who, produced in celebration of the programme's twentieth anniversary. It had its world premiere in the United States, on the Chicago PBS station WTTW and various other PBS member stations...

). In the 1963–1989 television series, such encounters were seen on three occasions, in The Three Doctors (1972), The Five Doctors (1983) and The Two Doctors
The Two Doctors
The Two Doctors is a serial in the British science fiction television series Doctor Who, which was first broadcast in three weekly parts from 16 February to 2 March 1985. It starred Colin Baker and Nicola Bryant as the Sixth Doctor and his companion Peri, respectively...

(1985). In Day of the Daleks
Day of the Daleks
Day of the Daleks is a serial in the British science fiction television series Doctor Who, which was first broadcast in four weekly parts from 1 January to 22 January 1972.-Synopsis:...

(1972), the Third Doctor and Jo Grant
Jo Grant
Josephine "Jo" Grant is a fictional character played by Katy Manning in the long-running British science fiction television series Doctor Who...

 very briefly met their future selves due to a glitch during a temporal experiment (the serial was supposed to end with the same scene depicted from the perspective of the "other" Doctor and Jo, but was excised because it was anticlimactic). In "Father's Day
Father's Day (Doctor Who)
"Father's Day" is the eighth episode in series one of the British science fiction television series Doctor Who. The episode was first broadcast on 14 May 2005...

" (2005), the Ninth Doctor and Rose observed but did not interact with past versions of themselves; when Rose changed history, the earlier selves – after momentarily noticing Rose running past – vanished and a temporal paradox was created that attracted the extradimensional Reapers. The Tenth and Fifth Doctors met in the TARDIS in the mini-episode "Time Crash
Time Crash
"Time Crash" is a mini-episode of the British science fiction television series Doctor Who. It was broadcast on 16 November 2007, as part of the BBC One telethon for the children's charity Children in Need...

", which aired on 16 November 2007 as part of the BBC's annual Children in Need
Children in Need
Children in Need is an annual British charity appeal organised by the BBC. Since 1980 it has raised over £500 million. The highlight of the Children in Need appeal is an annual telethon, held in November. A teddy bear named "Pudsey Bear" fronts the campaign, while Terry Wogan is a long...

 appeal. This marks the only time the Doctor has met a previous incarnation since the show's revival. Although the scene aired outside the series itself, it was established as taking place between the events of "Last of the Time Lords
Last of the Time Lords
"Last of the Time Lords" is an episode of the British science fiction television series Doctor Who. It was broadcast on BBC One on 30 June 2007, and is the thirteenth and final episode of Series 3 of the revived Doctor Who series...

" and "Voyage of the Damned
Voyage of the Damned (Doctor Who)
"Voyage of the Damned" is an episode of the British science fiction television series Doctor Who. First broadcast on 25 December 2007, it is 72 minutes long and the third Christmas special since the show's revival in 2005...

."

The BBC novel The Eight Doctors
The Eight Doctors
The Eight Doctors is a BBC Books original novel written by Terrance Dicks and based on the long-running British science fiction television series Doctor Who. It was the first of the Eighth Doctor Adventures range and features the Eighth Doctor and introduces his new companion, Sam Jones.The novel...

was written by respected Doctor Who writer Terrance Dicks
Terrance Dicks
Terrance Dicks is an English writer, best known for his work in television and for writing a large number of popular children's books during the 1970s and 80s.- Early career :...

, the same author who wrote The Five Doctors
The Five Doctors
The Five Doctors is a special feature-length episode of the British science fiction television series Doctor Who, produced in celebration of the programme's twentieth anniversary. It had its world premiere in the United States, on the Chicago PBS station WTTW and various other PBS member stations...

. In it, he tries to reconcile the continuity errors of the 1996 movie, while having the Eighth Doctor meet and interact with each of his previous selves.

Physical contact between two versions of the same person can lead to an energy discharge that shorts out the "time differential". This is apparently due to a principle known as the Blinovitch Limitation Effect
Blinovitch Limitation Effect
The Blinovitch Limitation Effect is a fictional principle of time travel physics in the universe of the long-running British science fiction television series Doctor Who....

, and was seen when the past and future versions of Brigadier Lethbridge-Stewart
Brigadier Lethbridge-Stewart
Brigadier Sir Alistair Gordon Lethbridge-Stewart, generally referred to simply as the Brigadier, is a fictional character in the British science fiction television series Doctor Who, played by Nicholas Courtney...

 touched hands in Mawdryn Undead. Oddly, the Doctor's incarnations do not appear to suffer this effect when encountering each other and shaking hands. This has never been explained. An essay in the About Time series by Lawrence Miles
Lawrence Miles
Lawrence Miles is a science fiction author known for his work on original Doctor Who novels and the subsequent spin-off Faction Paradox...

 and Tat Wood
Tat Wood
Tat Wood is co-writer of the About Time episode guides to the television series Doctor Who. This book series, begun in 2004, emphasises the importance of understanding the series in the context of British politics, culture and science. Volume Six is entirely Wood's work.Wood has also written for...

 suggests that Time Lords are somehow exempt from the effect by their very nature. Rose Tyler
Rose Tyler
Rose Marion Tyler is a fictional character portrayed by Billie Piper in the long-running British science fiction television series Doctor Who, and was created by series producer Russell T Davies...

 is seen holding an infant version of herself in "Father's Day", with no visible energy discharge, but the contact does allow the Reapers to enter the church in which the Doctor and several others are taking refuge. While doing a live commentary on the episode at the 2006 Bristol Comic Expo
Comic Expo
Comic Expo is the name given to the UK's largest comic book event. It is held twice a year: in Bristol in the spring and in Brighton in the autumn...

, episode author Paul Cornell
Paul Cornell
Paul Cornell is a British writer best known for his work in television drama as well as Doctor Who fiction, and as the creator of one of the Doctor's spin-off companions, Bernice Summerfield....

 said that this is supposed to be due to the Blinovitch Limitation Effect, even though it is not mentioned by name. He also suggested that the lack of a spark may be down to the fact that the Time Lords were no longer around to manage anomalies.

The interaction of the Doctor's various incarnations produces a continuity anomaly that requires suspension of disbelief
Suspension of disbelief
Suspension of disbelief or "willing suspension of disbelief" is a formula for justifying the use of fantastic or non-realistic elements in literary works of fiction...

 on the part of viewers, as one may assume that his past selves would forget that he would later regenerate. In Castrovalva, the newly-regenerated Fifth Doctor clearly indicates that the outcome of his regeneration cannot be predicted; however, the Fifth Doctor should have had memories from his earlier incarnations of having met himself per the events of The Two Doctors and The Five Doctors. Also, the Second, Third and Fifth Doctors should be already familiar with the events of The Five Doctors, having already lived through them multiple times. It has been suggested in fandom that the Time Lords erase the Doctor's memory after such encounters (and in The Two Doctors there is mention of Dastari administering to the Second Doctor a drug that he bemoans "affects the memory"); the novel The Empire of Glass
The Empire of Glass
The Empire of Glass is a Virgin Missing Adventures original novel written by Andy Lane based on the long-running British science fiction television series Doctor Who...

features the First Doctor directly after his return from the events of The Three Doctors, his memory of the adventure having been totally erased barring a vague recollection of meeting "a dandy
Third Doctor
The Third Doctor is the third incarnation of the protagonist of the long-running BBC television science-fiction series Doctor Who. He was portrayed by actor Jon Pertwee....

 and a clown
Second Doctor
The Second Doctor is the second incarnation of the protagonist of the long-running BBC television science-fiction series Doctor Who. He was portrayed by character actor Patrick Troughton....

". The Virgin Missing Adventures
Virgin Missing Adventures
The Virgin Missing Adventures were a series of novels from Virgin Publishing based on the British science-fiction television series Doctor Who, which had been cancelled in 1989, featuring stories set between televised episodes of the programme. The novels were published from 1994 to 1997, and...

 novel Cold Fusion
Cold Fusion (Doctor Who)
Cold Fusion is an original novel written by Lance Parkin and based on the long-running British science fiction television series Doctor Who. It features the Fifth Doctor, with Adric, Nyssa, and Tegan, immediately after Castrovalva...

by Lance Parkin
Lance Parkin
Lance Parkin is a British author, best known for writing fiction and reference books for television series, in particular Doctor Who and Emmerdale...

 suggests that memory-erasure is sometimes, but not always, due to something called "Blinovitch Conservation".

In the 2006 episode "School Reunion
School Reunion (Doctor Who)
"School Reunion" is the third episode in the second series of the British science fiction television series Doctor Who. It first aired on 29 April 2006. The episode's narrative takes place some time after the events of "The Christmas Invasion"...

", the Tenth Doctor and Sarah Jane Smith both seem to indicate in dialogue that they haven't seen each other since her departure from the TARDIS in The Hand of Fear
The Hand of Fear
The Hand of Fear is a serial in the British science fiction television series Doctor Who, which was first broadcast in four weekly parts from 2 October to 23 October 1976...

, although this contradicts their having met later during The Five Doctors. She, in that story, does not realise that the Fifth Doctor
Fifth Doctor
The Fifth Doctor is the fifth incarnation of the protagonist of the long-running BBC television science-fiction series Doctor Who. He is portrayed by Peter Davison....

 is a later incarnation of the third
Third Doctor
The Third Doctor is the third incarnation of the protagonist of the long-running BBC television science-fiction series Doctor Who. He was portrayed by actor Jon Pertwee....

 and fourth
Fourth Doctor
The Fourth Doctor is the fourth incarnation of the protagonist of the long-running BBC British television science-fiction series Doctor Who....

 Doctors with whom she had previously travelled. In "Time Crash", the Tenth Doctor remembers and reproduces what he saw himself do when he was the Fifth Doctor, a fact that seems to surprise the Fifth Doctor himself.

Russell T Davies has expressed a dislike for stories in which multiple incarnations of the Doctor meet, stating that he believes they focus more on the actors than on the story itself. David Tennant had shown enthusiasm for the idea of a multi-Doctor story, but has expressed doubts about the practicality of shows involving multiple previous Doctors, given that three of the actors who played the character are now deceased.
Since the series revival, there has been one multi-Doctor story, the Children in Need special Time Crash
Time Crash
"Time Crash" is a mini-episode of the British science fiction television series Doctor Who. It was broadcast on 16 November 2007, as part of the BBC One telethon for the children's charity Children in Need...

. Before that, the only references to past incarnations (from 1963 to 1996) have been in the aforementioned episode "School Reunion" (in which the Doctor acknowledges having regenerated "half a dozen times" since last seeing Sarah Jane
The Hand of Fear
The Hand of Fear is a serial in the British science fiction television series Doctor Who, which was first broadcast in four weekly parts from 2 October to 23 October 1976...

) and in drawings that the Doctor (who has temporarily become human to hide from the Family Of Blood) makes based on dreams of his other life in the 2007 episode "Human Nature
Human Nature (Doctor Who episode)
"Human Nature" is the eighth episode of the third series of the revived British science fiction television series Doctor Who. It is the first episode of a two-part story written by Paul Cornell adapted from his 1995 Doctor Who novel Human Nature...

". Seen on screen are the First, Fifth, Sixth, Seventh and Eighth Doctors, but a fuller view briefly available on the BBC website depicted all ten incarnations. However in the 2008 Christmas episode, The Next Doctor, the Tenth Doctor discovers an info stamp originally held by the Cybermen, which includes images of all his past selves. This is a clear affirmation of his past, and that the (then) current incarnation was indeed the Tenth
Tenth Doctor
The Tenth Doctor is the tenth incarnation of the protagonist of the long-running BBC television science-fiction series Doctor Who. He is played by David Tennant, who appears in three series, as well as eight specials...

. This was reaffirmed in the episode "The Eleventh Hour
The Eleventh Hour (Doctor Who)
"The Eleventh Hour" is an episode of the British science fiction television series Doctor Who. It was first broadcast on BBC One and BBC HD on 3 April 2010....

", when the Doctor asks the Atraxi whether this planet is protected. The Atraxi then shows 10 images, one of each Doctor from the first to the tenth, with the eleventh walking through the image of the tenth at the end. This is also confirmed in the episode "The Lodger
The Lodger (Doctor Who)
"The Lodger" is the eleventh episode of the fifth series of the British science fiction television series Doctor Who, first broadcast on BBC One on 12 June 2010...

", when the Doctor, explaining to Craig who and what he is, points at his face and says, "Eleventh."

Because each new Doctor is different from his previous incarnations, how their personalities interact varies when two or more different incarnations encounter each other. Time Crash featured Peter Davison
Peter Davison
Peter Davison is a British actor, best known for his roles as Tristan Farnon in the television version of James Herriot's All Creatures Great and Small and the fifth incarnation of the Doctor in Doctor Who, which he played from 1982 to 1984.-Early life:Davison was born Peter Moffett in Streatham,...

 returning as the Fifth Doctor. This event is explained as occurring due to the current Doctor having left his shields down when rebuilding the TARDIS following "Last of the Time Lords
Last of the Time Lords
"Last of the Time Lords" is an episode of the British science fiction television series Doctor Who. It was broadcast on BBC One on 30 June 2007, and is the thirteenth and final episode of Series 3 of the revived Doctor Who series...

" and then accidentally crossing the Fifth Doctor's timeline, allowing the two TARDISes to merge. When the Tenth Doctor effortlessly averts the impending Belgium-sized hole in the Universe caused by this temporal anomaly, he reveals having known what to do because he saw himself do it as the Fifth Doctor and remembered. He goes on to tell the Fifth Doctor how fond he was of his incarnation and how he influences the current Doctor's personality. However, in their two meetings, the Second Doctor
Second Doctor
The Second Doctor is the second incarnation of the protagonist of the long-running BBC television science-fiction series Doctor Who. He was portrayed by character actor Patrick Troughton....

 and Third Doctor
Third Doctor
The Third Doctor is the third incarnation of the protagonist of the long-running BBC television science-fiction series Doctor Who. He was portrayed by actor Jon Pertwee....

 had a degree of antagonism towards each other, with the patriarchal First Doctor
First Doctor
The First Doctor is the initial incarnation of the protagonist of the long-running BBC television science-fiction series Doctor Who. He was portrayed by the actor William Hartnell from 1963 to 1966. Hartnell reprised the role in the tenth anniversary story The Three Doctors in 1973 - albeit in a...

 critical of them both. During the Virgin New Adventures
Virgin New Adventures
The Virgin New Adventures were a series of novels from Virgin Publishing based on the British science-fiction television series Doctor Who...

, the Seventh Doctor was occasionally at odds with his subconscious memory of his previous incarnation as his memory of his past self became increasingly associated with the Valeyard
Valeyard
The Valeyard is a fictional character from the long-running British science fiction television series, Doctor Who. He is described as an aspect of the Doctor from between his twelfth and final incarnations as depicted in the TV show or regenerations in the novelization of the story...

, his dark future self, but he eventually accepted his dark side and 'reformed' his memory of his former self, although it was never established how the two Doctors would interact if they had met in person.

A unique scenario occurs in "Last Night", the fourth chapter of the five-part "mini-episode" Night and the Doctor, which debuted in the November 2011 DVD and Blu-ray box set release of the 2011 Series 6. In this Steven Moffat-written story, two versions of the Eleventh Doctor from different timelines meet and carry on a brief conversation.

Reprising the role

On a few occasions, previous Doctors have returned to the role, guest-starring with the incumbent:
  • William Hartnell
    William Hartnell
    William Henry Hartnell was an English actor. During 1963-66, he was the first actor to play the Doctor in the long-running BBC science fiction television series Doctor Who.-Early life:...

     and Patrick Troughton
    Patrick Troughton
    Patrick George Troughton was an English actor most widely known for his roles in fantasy, science fiction and horror films, particularly in his role as the second incarnation of the Doctor in the long-running British science-fiction television series Doctor Who, which he played from 1966 to 1969,...

     with Jon Pertwee
    Jon Pertwee
    John Devon Roland Pertwee , was an English actor. Pertwee is best known for his role in the BBC science fiction television series Doctor Who, in which he played the third incarnation of the Doctor from 1970 to 1974, and as the title character in the series Worzel Gummidge...

     in The Three Doctors. Originally Hartnell's role had been intended to be more extensive, but his health had deteriorated to the extent that he could only make a limited appearance. In the end, it turned out to be his last television role.
  • Troughton and Pertwee with Peter Davison
    Peter Davison
    Peter Davison is a British actor, best known for his roles as Tristan Farnon in the television version of James Herriot's All Creatures Great and Small and the fifth incarnation of the Doctor in Doctor Who, which he played from 1982 to 1984.-Early life:Davison was born Peter Moffett in Streatham,...

     in The Five Doctors
    The Five Doctors
    The Five Doctors is a special feature-length episode of the British science fiction television series Doctor Who, produced in celebration of the programme's twentieth anniversary. It had its world premiere in the United States, on the Chicago PBS station WTTW and various other PBS member stations...

    , the twentieth anniversary special, with another actor, Richard Hurndall
    Richard Hurndall
    Richard Gibbon Hurndall was an English actor.-BBC radio:Hurndall was born in Darlington and he attended Claremont Preparatory School, Darlington and Scarborough College, before training as an actor at the Royal Academy of Dramatic Arts. He then appeared in several plays at Stratford-upon-Avon...

    , standing in for the late William Hartnell (the story began with a clip from The Dalek Invasion of Earth
    The Dalek Invasion of Earth
    The Dalek Invasion of Earth is a serial in the British science fiction television series Doctor Who, which originally aired in six weekly parts from November 21 to December 26, 1964....

    featuring Hartnell himself). Tom Baker
    Tom Baker
    Thomas Stewart "Tom" Baker is a British actor. He is best known for playing the fourth incarnation of the Doctor in the science fiction television series Doctor Who, a role he played from 1974 to 1981.-Early life:...

     declined to appear, feeling that the role came too soon after he had left the programme (a decision he later said he regretted) and the narrative was reworked to use clips from Shada
    Shada
    Shada is an unaired serial of the British science fiction television series Doctor Who. It was intended to be the final serial of the 1979-80 season , but was never completed due to a strike at the BBC during filming...

    , an intended six-part story from the Fourth Doctor's era that was never completed due to industrial action. A waxwork dummy of Baker from Madame Tussauds
    Madame Tussauds
    Madame Tussauds is a wax museum in London with branches in a number of major cities. It was founded by wax sculptor Marie Tussaud and was formerly known as "Madame Tussaud's", but the apostrophe is no longer used...

     was used in the publicity photographs.
  • Patrick Troughton with Colin Baker
    Colin Baker
    Colin Baker is a British actor who is known for playing Paul Merroney in The Brothers from 1974 to 1976 and as the sixth incarnation of the Doctor in the long-running science fiction television series Doctor Who, from 1984 to 1986.- Background:Colin Baker was born in London, but moved north to...

     in The Two Doctors
    The Two Doctors
    The Two Doctors is a serial in the British science fiction television series Doctor Who, which was first broadcast in three weekly parts from 16 February to 2 March 1985. It starred Colin Baker and Nicola Bryant as the Sixth Doctor and his companion Peri, respectively...

    .
  • Jon Pertwee, Tom Baker, Peter Davison, Colin Baker, and Sylvester McCoy
    Sylvester McCoy
    Sylvester McCoy is a Scottish actor. As a comic act and busker he appeared regularly on stage and on BBC Children's television in the 1970s and 80s, but is best known for playing the seventh incarnation of the Doctor in the long-running science fiction television series Doctor Who from 1987 to...

     – with rubber dummy heads standing in for the late William Hartnell and the late Patrick Troughton—in Dimensions in Time
    Dimensions in Time
    Dimensions in Time is a charity special crossover between the British science fiction television series Doctor Who and the soap opera EastEnders that ran in two parts on 26 and 27 November 1993. It was filmed on the EastEnders Albert Square set, and features several of the stars of that programme...

    , a charity special in aid of Children in Need
    Children in Need
    Children in Need is an annual British charity appeal organised by the BBC. Since 1980 it has raised over £500 million. The highlight of the Children in Need appeal is an annual telethon, held in November. A teddy bear named "Pudsey Bear" fronts the campaign, while Terry Wogan is a long...

     in 1993, the programme's 30th anniversary year. Except for the mannequin
    Mannequin
    A mannequin is an often articulated doll used by artists, tailors, dressmakers, and others especially to display or fit clothing...

     versions of Hartnell and Troughton, no two Doctors are shown on screen at the same time. (This story was a crossover with EastEnders
    EastEnders
    EastEnders is a British television soap opera, first broadcast in the United Kingdom on BBC One on 19 February 1985 and continuing to today. EastEnders storylines examine the domestic and professional lives of the people who live and work in the fictional London Borough of Walford in the East End...

    ).
  • Peter Davison, Colin Baker and Sylvester McCoy in the first Big Finish audio adventure, The Sirens of Time
    The Sirens of Time
    The Sirens of Time is the first Big Finish Productions audio drama based on the long-running British science fiction television series Doctor Who. The story was written by Nicholas Briggs and stars Peter Davison, Colin Baker and Sylvester McCoy...

    .
  • Peter Davison, Colin Baker, Sylvester McCoy and Paul McGann
    Paul McGann
    Paul McGann is an English actor who made his name on the BBC serial The Monocled Mutineer, in which he played the lead role...

    - the first three appearing initially as holograms using the Doctors' appearances and later as the Eighth Doctor
    Eighth Doctor
    The Eighth Doctor is the eighth incarnation of the protagonist of the long-running BBC television science-fiction series Doctor Who. He was portrayed by Paul McGann...

    's subconscious memory of his past selves), with Jon Pertwee posthumously joining them by virtue of an extant fan recording, in the audio
    Big Finish Productions
    Big Finish Productions is a British company that produces books and audio plays based, primarily, on cult British science fiction properties...

     adventure Zagreus, a fortieth anniversary special and the fiftieth release.
  • Colin Baker and Sylvester McCoy in the second half of the audio Project Lazarus
    Project Lazarus
    Project: Lazarus is a Big Finish Productions audio drama based on the long-running British science fiction television series Doctor Who. It is a sequel to Project: Twilight and a predecessor to Project: Destiny.-Plot:...

    (Although the Sixth Doctor in this story is later revealed to be a clone
    Cloning
    Cloning in biology is the process of producing similar populations of genetically identical individuals that occurs in nature when organisms such as bacteria, insects or plants reproduce asexually. Cloning in biotechnology refers to processes used to create copies of DNA fragments , cells , or...

     of the Sixth Doctor created from DNA samples extracted during his previous visit rather than the actual Sixth Doctor).
  • Peter Davison with David Tennant
    David Tennant
    David Tennant is a Scottish actor. In addition to his work in theatre, including a widely praised Hamlet, Tennant is best known for his role as the tenth incarnation of the Doctor in Doctor Who, along with the title role in the 2005 TV serial Casanova and as Barty Crouch, Jr...

     in the 2007 Children in Need
    Children in Need
    Children in Need is an annual British charity appeal organised by the BBC. Since 1980 it has raised over £500 million. The highlight of the Children in Need appeal is an annual telethon, held in November. A teddy bear named "Pudsey Bear" fronts the campaign, while Terry Wogan is a long...

     special "Time Crash
    Time Crash
    "Time Crash" is a mini-episode of the British science fiction television series Doctor Who. It was broadcast on 16 November 2007, as part of the BBC One telethon for the children's charity Children in Need...

    ".
  • Peter Davison, Colin Baker, Sylvester McCoy and Paul McGann in the Big Finish Audio The Four Doctors
    The Four Doctors
    The Four Doctors is a Big Finish Productions audiobook based on the long-running British science fiction television series Doctor Who. It is free to subscribers of The Demons of Red Lodge and Other Stories.-Plot:...

    .


Other actors have portrayed the character of the Doctor outside of the television series. For details on this see under Adaptations and other appearances in the main article and Doctor Who spin-offs
Doctor Who spin-offs
Doctor Who spin-offs refers to material created outside of, but related to, the long-running British science fiction television series Doctor Who....

.

For a list of all actors who have played the Doctor see List of actors who have played the Doctor.

Age

In early production documents, the Doctor was said to be 650 years old, although this was never stated on screen. By the time the Doctor did cite his age ("Let me see, in human terms, 400, yes, 450 years" in the serial The Tomb of the Cybermen
The Tomb of the Cybermen
The Tomb of the Cybermen is a serial in the British science fiction television series Doctor Who that originally aired in four weekly parts from September 2 to September 23, 1967 and is the earliest serial starring Patrick Troughton as the Second Doctor to exist in its entirety...

; he also kept a 500-year diary), he had already regenerated to a younger form. The intention at that time was that regeneration had turned back the Doctor's clock, making him younger both in appearance and in biological age. Since the Doctor's age had never previously been given, 450 Earth years became a starting point onto which further years would be progressively added as the series continued and the character lived out his further incarnations.

The Third Doctor implied in Doctor Who and the Silurians
Doctor Who and the Silurians
Doctor Who and the Silurians is a serial in the British science fiction television series Doctor Who, which was first broadcast in seven weekly parts from January 31 to March 14, 1970. The story is the first appearance of a recurring family of Earth-dwelling reptiles...

and in The Mind of Evil
The Mind of Evil
The Mind of Evil is a serial in the British science fiction television series Doctor Who, which was first broadcast in six weekly parts from 30 January to 6 March 1971.-Plot:...

that he had a lifetime that covered "several thousand years", though in either case he may have been referring to the breadth of time he had visited (or was able to visit) rather than actually lived through, or perhaps his own life expectancy. While the Doctor's age has never been a known quantity, these numbers are the most difficult to reconcile with the rest of the series.

By the time of The Brain of Morbius, the Fourth Doctor was stated to be 749 years old ("something like 750 years" in the prior Pyramids of Mars
Pyramids of Mars
Pyramids of Mars is a serial in the British science fiction television series Doctor Who, which was first broadcast in four weekly parts from 25 October to 15 November 1975.-Synopsis:...

). In The Ribos Operation
The Ribos Operation
The Ribos Operation is a serial in the British science fiction television series Doctor Who, which was first broadcast in four weekly parts from September 2 to September 23, 1978. This serial introduces Mary Tamm as the companion Romana. After finishing his first year as producer of Doctor Who,...

, Romana
Romana
Romana, short for Romanadvoratrelundar, is a fictional character in the long-running British science fiction television series Doctor Who...

 said the Doctor was 759 years old and had been piloting the TARDIS for 523 years, making him 236 when he first "borrowed" it. When the Doctor encounters his old friend Drax in The Armageddon Factor
The Armageddon Factor
The Armageddon Factor is a serial in the British science fiction television series Doctor Who, which was first broadcast in six weekly parts from 20 January to 24 February 1979...

, Drax says it has been 450 years since their time together at the Academy, suggesting only that Drax was 450 years younger, but implying nothing about the Doctor's age, since it could have been a different amount of time for him. Drax also implies that the Doctor got his doctorate after that.

In Revelation of the Daleks
Revelation of the Daleks
Revelation of the Daleks is a serial in the British science fiction television series Doctor Who, which was first broadcast in two weekly parts on 23 March and 30 March 1985...

the Sixth Doctor said that he was "a 900-year-old Time Lord", and in Time and the Rani
Time and the Rani
Time and the Rani is a serial in the British science fiction television series Doctor Who, which was first broadcast in four weekly parts from 7 September to 28 September 1987. This story was the first to feature Sylvester McCoy as the Doctor. It also features the last appearance of the Sixth...

, the Seventh Doctor's age was 953, the same as villainous Time Lady the Rani
Rani (Doctor Who)
The Rani is a fictional character in the British science fiction television series Doctor Who. She was played by Kate O'Mara. The word "Rani" means "queen" in the Urdu and Hindi languages and "The Rani" follows the naming convention for other renegade timelords, "The Doctor," "The Monk," "The War...

 (in both serials, the Doctor's age is stated in dialogue). In Remembrance of the Daleks
Remembrance of the Daleks
Remembrance of the Daleks is a serial in the British science fiction television series Doctor Who, which was first broadcast in four weekly parts from 5 October to 26 October 1988....

the Seventh Doctor said that he had "900 years’ experience" rewiring alien equipment. At the beginning of the 1996 television movie, the Seventh Doctor was shown to have a 900-year diary in his TARDIS.

In the spin-off prose fiction, in the Fourth Doctor comic "The Time Witch" after the Doctor and Sharon cross through the split in time which they age four years which the Doctor says "I shall still think of myself as 743 ... or was it 730, I never can remember...", the Sixth Doctor celebrated his 991st birthday in the short story "Brief Encounter: A Wee Deoch an..?", written by Colin Baker
Colin Baker
Colin Baker is a British actor who is known for playing Paul Merroney in The Brothers from 1974 to 1976 and as the sixth incarnation of the Doctor in the long-running science fiction television series Doctor Who, from 1984 to 1986.- Background:Colin Baker was born in London, but moved north to...

 himself, in Doctor Who Magazine
Doctor Who Magazine
Doctor Who Magazine is a magazine devoted to the long-running British science fiction television series Doctor Who...

 Winter Special 1991
: UNIT Exposed, while the Seventh Doctor celebrated his 1,000th birthday in Set Piece
Set Piece (Doctor Who)
Set Piece is an original novel written by Kate Orman and based on the long-running British science fiction television series Doctor Who. It features the Seventh Doctor, Ace, Bernice and Kadiatu Lethbridge-Stewart. It is the last New Adventure to feature Ace as a regular character, although she...

by Kate Orman
Kate Orman
Kate Orman is an Australian author, best known for her books connected to the British science-fiction television series Doctor Who.-Biography:...

, and the Eighth Doctor declared his age to be 1,012 in Vampire Science
Vampire Science
Vampire Science is the second novel in the BBC Books series, the Eighth Doctor Adventures, based upon the BBC's long-running science fiction television series, Doctor Who...

by Orman and Jonathan Blum
Jonathan Blum
Jonathan Blum is an American writer most known for his work for various Doctor Who spin-offs, usually with his wife Kate Orman although he has also been published on his own...

. The Eighth Doctor spent nearly a century on Earth during a story arc spread over several novels, and also spent around 100 years asleep in The Sleep of Reason
The Sleep of Reason
The Sleep of Reason is a BBC Books original novel written by Martin Day and based on the long-running British science fiction television series Doctor Who...

by Martin Day
Martin Day
Martin Day is a screenwriter and novelist best known for his work on various spin-offs related to the BBC Television series Doctor Who, and many episodes of the daytime soaps Doctors and Family Affairs.-Work:...

. Furthermore, in the Big Finish Productions
Big Finish Productions
Big Finish Productions is a British company that produces books and audio plays based, primarily, on cult British science fiction properties...

 audio play Orbis
Orbis (Doctor Who audio)
Orbis is an audio drama based on the long-running British science fiction television series Doctor Who. This audio drama was produced by Big Finish Productions.-Plot:...

the Eighth Doctor says that he has spent 600 years living on the planet Orbis since the last play Vengeance of Morbius
Vengeance of Morbius
Vengeance of Morbius is an audio drama based on the long-running British science fiction television series Doctor Who. This audio drama was produced by Big Finish Productions....

. In the same play he states that he lost count of his true age a long time previously and that he rounds it down and takes into account the different lengths of what is called a "year" in different locations (Although this implies that he might have been referring to 'years' based on Orbis's measurements rather than Earth's).

In the 2005 series, the Doctor's age is stated in publicity materials as 900 years, and in "Aliens of London
Aliens of London
"Aliens of London" is the fourth episode of the first series of the British science fiction television show Doctor Who that was first broadcast on 16 April 2005. The Doctor takes Rose back to 21st century London, just in time to witness a spaceship crashing into the River Thames, triggering a...

", he says, "Nine hundred years of time and space, and I've never been slapped by someone's mother." Rose follows up by asking him if he is 900 years old, and he replies affirmatively, though it is unclear whether he is being disingenuous. He restates this as "Nine hundred years of phone box travel and it's the only thing left that surprises me", however, in "The Empty Child
The Empty Child
"The Empty Child" is an episode in the British science fiction television series Doctor Who, which was first broadcast on 21 May 2005. It is the first of a two-part story. The concluding episode, "The Doctor Dances", was broadcast on 28 May...

". In "Voyage of the Damned
Voyage of the Damned (Doctor Who)
"Voyage of the Damned" is an episode of the British science fiction television series Doctor Who. First broadcast on 25 December 2007, it is 72 minutes long and the third Christmas special since the show's revival in 2005...

", the Tenth Doctor
Tenth Doctor
The Tenth Doctor is the tenth incarnation of the protagonist of the long-running BBC television science-fiction series Doctor Who. He is played by David Tennant, who appears in three series, as well as eight specials...

 states that he is 903 years of age, the first time since Time and the Rani that an exact number has been stated in dialogue; previously, the Master
Master (Doctor Who)
The Master is a recurring character in the British science fiction television series Doctor Who. He is a renegade Time Lord and the archenemy of the Doctor....

 also indicated the Doctor's age to be about 900 in the "The Sound of Drums
The Sound of Drums
"The Sound of Drums" is an episode of the British science fiction television series Doctor Who. It was broadcast on BBC One on 23 June 2007, and is the twelfth episode of Series 3 of the revived Doctor Who series...

"/"Last of the Time Lords
Last of the Time Lords
"Last of the Time Lords" is an episode of the British science fiction television series Doctor Who. It was broadcast on BBC One on 30 June 2007, and is the thirteenth and final episode of Series 3 of the revived Doctor Who series...

" story arc.

How this figure is to be reconciled with the Doctor's age in the rest of the series and spin-off media is uncertain.

At the end of "The Sound of Drums", the Master ages the Doctor by 100 years using his laser screwdriver, leading the Doctor to assume an elderly appearance. In "Last of the Time Lords
Last of the Time Lords
"Last of the Time Lords" is an episode of the British science fiction television series Doctor Who. It was broadcast on BBC One on 30 June 2007, and is the thirteenth and final episode of Series 3 of the revived Doctor Who series...

", the Master states to the population of Earth that the Doctor is nine hundred years old, and informs his subjects he will show them the Doctor's true form, suspending his ability to regenerate. The Master proceeds to age the Doctor further with his laser screwdriver, reducing him to a tiny, wrinkled being subsequently imprisoned inside a bird cage until reverted to his current form with the help of Martha Jones, 15 satellites and the entire population of Earth. However as the resolution of that story is by means of a reversal of time, there is a suggestion that the events of that year never actually took place, and yet are present in the Doctor's memory.

In The End of Time
The End of Time
The End of Time: The Next Revolution in Our Understanding of the Universe, also sold with the alternate subtitle The Next Revolution in Physics, is a 1999 science book in which the author Julian Barbour argues that time exists merely as an illusion.-Auto-biography:The book begins by describing how...

the Doctor tells Wilfred Mott he is 906 years old. At the end of Flesh and Stone
Flesh and Stone
"Flesh and Stone" is the fifth episode of the fifth series of British science fiction television series Doctor Who. Written by showrunner Steven Moffat and directed by Adam Smith, the episode was first broadcast on 1 May 2010 on BBC One...

, he tells Amy Pond that he is 907, whilst in "The Impossible Astronaut
The Impossible Astronaut
"The Impossible Astronaut" is the first episode of the sixth series of the British science fiction television series Doctor Who. Written by show runner Steven Moffat, and directed by Toby Haynes, the episode was first broadcast on 23 April 2011 in the United Kingdom, as well as the United States...

" he is 909, with a later Doctor also appearing who is 1103. In "The Doctor's Wife
The Doctor's Wife (Doctor Who)
"The Doctor's Wife" is the fourth episode of the sixth series of the British science fiction television series Doctor Who, which was broadcast on 14 May 2011 in the United Kingdom, as well as in the United States...

", the TARDIS while embodied as Idris says the Doctor has been travelling with her for 700 years – making him, if precise and if he had not also spent any extended periods away from the TARDIS along the way, at least 936 according to figures Romana provided in "The Ribos Operation
The Ribos Operation
The Ribos Operation is a serial in the British science fiction television series Doctor Who, which was first broadcast in four weekly parts from September 2 to September 23, 1978. This serial introduces Mary Tamm as the companion Romana. After finishing his first year as producer of Doctor Who,...

".

Current producer Steven Moffat
Steven Moffat
Steven Moffat is a Scottish television writer and producer.Moffat's first television work was the teen drama series Press Gang. His first sitcom, Joking Apart, was inspired by the breakdown of his first marriage; conversely, his later sitcom Coupling was based upon the development of his...

 has stated that the Doctor simply does not know his own age, given the non-linear time-travelling nature of his life.

Romance

In the very first episode of the television series it is established that Susan Foreman
Susan Foreman
Susan Foreman is a fictional character in the British science fiction television series Doctor Who. The granddaughter and original companion of the First Doctor, she was played by actress Carole Ann Ford from 1963 to 1964, in the show's first season and the first two stories of the second season...

 is the Doctor's granddaughter, but neither Susan nor the Doctor ever speak of her parents. In "Fear Her
Fear Her
"Fear Her" is an episode of the British science fiction television series Doctor Who. It was first broadcast on 24 June 2006.The episode takes part on the day of the opening ceremony of the 2012 Summer Olympics in London, almost exclusively on a fictitious cul-de-sac named after the British athlete...

" (2006), the Doctor states that he was "a dad once", suggesting that he reproduced at some point. Furthermore, in "The Doctor's Daughter
The Doctor's Daughter
"The Doctor's Daughter" is the sixth episode of the fourth series of British science fiction television series Doctor Who. It was broadcast on BBC One on 10 May 2008.- Synopsis :...

", his DNA was used to produce an "offspring".

The First Doctor did flirt with—and was accidentally engaged to—the character Cameca in The Aztecs
The Aztecs (Doctor Who)
-VHS and DVD releases:*The serial was released on VHS in 1992.*On 21 October 2002, it was released on Region 2 DVD. This release was the first Doctor Who DVD to use the VidFIRE process throughout the whole production.-External links:Fan reviews...

; although this was part of a plot to get the TARDIS back, there was a hint of mutual attraction in Hartnell's performance (especially as he is ultimately unable to leave behind the love token she has given him). The fact that the TARDIS crew kept pressing forward in their travels was probably also a factor in preventing any romantic attachments.

As the series progressed and grew more popular among children, the Doctor was firmly established as an avuncular figure to his younger companions, the one exception being the Third Doctor's hurt reaction to his companion Jo Grant
Jo Grant
Josephine "Jo" Grant is a fictional character played by Katy Manning in the long-running British science fiction television series Doctor Who...

's leaving him for an idealistic scientific adventurer whom she describes as "a younger version" of the Doctor (The Green Death
The Green Death
The Green Death is a serial in the British science fiction television series Doctor Who, first broadcast in six weekly parts from 19 May 1973 to 23 June 1973. It was the last to feature Katy Manning as companion Jo Grant in Doctor Who...

). Jo kisses the Doctor on the cheek before she departs, the second time this form of affection had been shown on screen (the second Doctor having similarly kissed Zoe
Zoe Heriot
Zoe Heriot , or simply Zoe, is a fictional character played by Wendy Padbury in the long-running British science fiction television series Doctor Who...

 in The War Games
The War Games
The War Games is a serial in the British science fiction television series Doctor Who, which originally aired in ten weekly parts from 19 April to 21 June 1969. It was the last regular appearance of Patrick Troughton as the Second Doctor, and of Wendy Padbury and Frazer Hines as companions Zoe...

).

Despite the press (and, occasionally, the production team) trying to play up the sexiness of some of the female companions or suggesting "hanky panky" in the TARDIS, the series reached the point where any suggestion of the Doctor as a sexual being was avoided altogether. One example was during City of Death
City of Death
-Pre-production:Writer David Fisher had contributed two scripts to Doctor Whos sixteenth season – The Stones of Blood and The Androids of Tara – and was asked by producer Graham Williams for further story ideas...

, when the Fourth Doctor says to Countess Scarlioni, "You're a beautiful woman, probably". This rule held true even when the Doctor's apparent age was closer to those of his companions, or if there was on-screen chemistry between the actors, as there was between Fourth Doctor Tom Baker
Tom Baker
Thomas Stewart "Tom" Baker is a British actor. He is best known for playing the fourth incarnation of the Doctor in the science fiction television series Doctor Who, a role he played from 1974 to 1981.-Early life:...

 and his wife-to-be Lalla Ward
Lalla Ward
Sarah Ward known as Lalla Ward, is an English actor, author and illustrator. As an actor, she is known for playing the part of Romana in the BBC science fiction television series Doctor Who. She is married to evolutionary biologist Richard Dawkins.-Early career:Ward's stage name, "Lalla", comes...

's Romana II. In fact, a 1980 television commercial broadcast in Australia for Prime Computers showed Baker and Ward romancing each other, in character as The Doctor and Romana, with the commercial ending with The Doctor (prompted by the computer) proposing marriage. These commercials are not part of the regular series continuity.

In some of the voiceovers on Peter Davison's DVDs the matter of physically expressed sexual attention is discussed. According to Peter Davison and Matthew Waterhouse
Matthew Waterhouse
Matthew Waterhouse is an English actor and writer best known for his role as Adric in the BBC science fiction television series Doctor Who.-Early life:...

 (Adric
Adric
Adric is a fictional character played by Matthew Waterhouse in the long-running British science fiction television series Doctor Who. He was a young native of the planet Alzarius, which exists in the parallel universe of E-Space. A companion of the Fourth and Fifth Doctors, he was a regular in the...

), John Nathan-Turner had very strict rules laid down about how the companions were allowed to physically interact with the Doctor, and Adric was allowed more physical contact with the Doctor than the female companions to downplay any potential romantic and/or sexual connotations.

The perception of the Doctor as essentially an asexual
Asexuality
Asexuality , in its broadest sense, is the lack of sexual attraction and, in some cases, the lack of interest in sex. Sometimes, it is considered a lack of a sexual orientation...

 character, uninterested in romance, is why some portions of fandom reacted so strongly to the Eighth Doctor (Paul McGann
Paul McGann
Paul McGann is an English actor who made his name on the BBC serial The Monocled Mutineer, in which he played the lead role...

) kissing Dr. Grace Holloway
Grace Holloway
Dr. Grace Holloway is a fictional character played by Daphne Ashbrook in the 1996 television movie Doctor Who, a continuation of the long-running British science fiction television series Doctor Who...

 in the 1996 television movie, breaking the series' long-standing taboo against the Doctor having any romantic involvement with his companions.

The modern series has suggested that the Doctor has romantic feelings towards different people, but intentionally represses them.
In "The Parting of the Ways" he kisses Rose Tyler, but only to get the time vortex energy that was killing her back into the TARDIS. In "School Reunion
School Reunion (Doctor Who)
"School Reunion" is the third episode in the second series of the British science fiction television series Doctor Who. It first aired on 29 April 2006. The episode's narrative takes place some time after the events of "The Christmas Invasion"...

" the Doctor expresses dismay at having his companions age while he regenerates. In "The Next Doctor" he tells Jackson Lake that his companions "break [his] hearts". In "New Earth
New Earth
"New Earth" is the first episode of the second series of the British science fiction television series Doctor Who, first broadcast on 15 April 2006. It is a sequel to the first series episode "The End of the World", and brings back its villain who was thought to be destroyed, Lady Cassandra, as...

", Rose's body is temporarily inhabited by Cassandra, who kisses the Doctor romantically. This is one of the few scenes in the entire series where the Doctor is kissed romantically by his companion. Continuity is maintained by the Doctor immediately suspecting that this is not the "real" Rose. He later was about to admit he loved Rose when they were having what was going to apparently be their final meeting, but was cut off before he could finish the sentence. The loss of Rose left him devastated and he was delighted with her later return, but left her on a parallel earth with a half-human clone of himself that could grow old with her.

Following his regeneration, the Eleventh Doctor
Eleventh Doctor
The Eleventh Doctor is the eleventh incarnation of the protagonist of the BBC television science-fiction series Doctor Who. Matt Smith plays this incarnation, replacing David Tennant's Tenth Doctor in the 2010 episode "The End of Time, Part Two"...

 expresses shock at the idea of his new companion Amy Pond
Amy Pond
Amelia Jessica 'Amy' Pond is a fictional character portrayed by Karen Gillan in the long-running British science fiction television series Doctor Who...

 kissing him by protesting that she was human. He also demonstrates a complex relationship with the mysterious River Song
River Song (Doctor Who)
River Song is a fictional character played primarily by Alex Kingston in the British science-fiction series Doctor Who. River Song was introduced to the series as an experienced future companion of series protagonist the Doctor, an alien Time Lord who travels through time in his TARDIS...

, and they marry in "The Wedding of River Song
The Wedding of River Song
"The Wedding of River Song" is the thirteenth and final episode of the sixth series of the British science fiction television series Doctor Who, and was first broadcast on BBC One, BBC America and Space on 1 October 2011.-Plot:...

".

Spin-off passion

However, the spin-off media both before and after the television movie have toyed with the idea in various ways. In the 1995 Virgin New Adventures novel Human Nature by Paul Cornell
Paul Cornell
Paul Cornell is a British writer best known for his work in television drama as well as Doctor Who fiction, and as the creator of one of the Doctor's spin-off companions, Bernice Summerfield....

, the Seventh Doctor takes on the human guise of "Dr John Smith" and has a romance with a teacher named Joan in 1914, albeit as a means to understand the human condition and with the Doctor's own memories as a Time Lord suppressed. The relationship ended when the Doctor was restored to normal, the Doctor admitting to Joan that he knows that Smith was fond of her but unable to reciprocate those feelings himself. This novel was adapted to the screen and comprised two episodes in the new series: "Human Nature" and "The Family of Blood", featuring the Tenth Doctor, with the Doctor implying that he retained Smith's feelings for Joan, although the more traumatic nature of the transformation may have impacted his feelings after he returned to normal.

The concluding chapter of The Dying Days
The Dying Days
The Dying Days is an original novel written by Lance Parkin and based on the long-running British science fiction television series Doctor Who. It was last of that range to feature the Doctor and the only one of that range to feature Paul McGann's Eighth Doctor. Thereafter the series centred around...

, an Eighth Doctor novel by Lance Parkin
Lance Parkin
Lance Parkin is a British author, best known for writing fiction and reference books for television series, in particular Doctor Who and Emmerdale...

, strongly implies intimacy occurring between the Doctor and Bernice Summerfield
Bernice Summerfield
Bernice Surprise Summerfield is a fictional character created by author Paul Cornell as a new companion of the Seventh Doctor in Virgin Publishing's range of original full-length Doctor Who novels, the New Adventures...

. In the Virgin novel Death and Diplomacy
Death and Diplomacy
Death and Diplomacy is an original novel written by Dave Stone and based on the long-running British science fiction television series Doctor Who. It features the Seventh Doctor, Bernice, Chris, Roz and the first appearance of Jason....

, by Dave Stone
Dave Stone
-Biography:Stone has written many spin off novels based on the BBC science fiction television series Doctor Who and Judge Dredd.Stone also contributed a number of comic series to 2000AD and the Judge Dredd Megazine, focusing on the Dreddverse...

, the Seventh Doctor implies that he intentionally creates an image of asexuality
Asexuality
Asexuality , in its broadest sense, is the lack of sexual attraction and, in some cases, the lack of interest in sex. Sometimes, it is considered a lack of a sexual orientation...

 to keep things simple. The Eighth Doctor elaborated on this idea in Interference- Book Two: Hour of the Geek, explaining that he had begun to experience an interest in romance and the idea of being close to someone in this body, but was reluctant to explore those feelings with his companions due to the amount of baggage a relationship with him would include.

In various novels—especially Lungbarrow
Lungbarrow
Lungbarrow is an original novel written by Marc Platt and based on the long-running British science fiction television series Doctor Who...

– it is also established that Time Lords do not reproduce sexually, but emerge from genetic Looms fully grown, although in equivocal fashion the same book also hints that the Doctor's birth was an exception (unlike his cousins he has a belly button). This idea was brought to the forefront in the '96 movie, where the Doctor states he is "half-human, on [his] mother's side", suggesting he had a normal human birth, rather than a synthetic Gallifreyan one. Madame de Pompadour's reference to the Doctor's lonely childhood in "The Girl in the Fireplace" would also seem to contradict the Loom theory. The 2007 episode "The Sound of Drums" also directly contradicts this, with Gallifreyan children leaving for the academy when they reach the age of 8. This episode also shows a young Master
Master (Doctor Who)
The Master is a recurring character in the British science fiction television series Doctor Who. He is a renegade Time Lord and the archenemy of the Doctor....

. These mentions of early Time Lord childhood are repeated in the 2009/2010 "The End of Time
The End of Time
The End of Time: The Next Revolution in Our Understanding of the Universe, also sold with the alternate subtitle The Next Revolution in Physics, is a 1999 science book in which the author Julian Barbour argues that time exists merely as an illusion.-Auto-biography:The book begins by describing how...

". It should be noted however, that "The Infinity Doctors
The Infinity Doctors
The Infinity Doctors is a BBC Books original novel written by Lance Parkin and based on the long-running British science fiction television series Doctor Who...

" and "Cold Fusion
Cold Fusion (Doctor Who)
Cold Fusion is an original novel written by Lance Parkin and based on the long-running British science fiction television series Doctor Who. It features the Fifth Doctor, with Adric, Nyssa, and Tegan, immediately after Castrovalva...

" suggest that certain "wombborn" families have survived in secret and that the Doctor and the Master are somehow from one of these families.

The classic series also made occasional references to the Doctor's childhood on Gallifrey (The Time Monster
The Time Monster
The Time Monster is a serial in the British science fiction television series Doctor Who, which was first broadcast in six weekly parts from 20 May to 24 June 1972.- Synopsis :...

, State of Decay
State of Decay
State of Decay is a serial in the British science fiction television series Doctor Who, which was first broadcast in four weekly parts from 22 November to 13 December 1980. The serial was the second of three loosely connected serials known as the E-Space trilogy...

and Black Orchid
Black Orchid (Doctor Who)
Black Orchid is a serial in the British science fiction television series Doctor Who, which was first broadcast in two parts on 1 March and 2 March 1982...

), and there had been the occasional reference to Gallifreyan children, also referred to as "Time Tots" by Romana in the audio adventure Zagreus
Zagreus (Doctor Who audio)
Zagreus is a Big Finish Productions audio drama based on the long-running British science fiction television series Doctor Who. This audio drama was presented on three compact discs, and was made by Big Finish as their primary release to celebrate forty years of Doctor Who.-Plot:Following directly...

and the incomplete 1979 serial Shada
Shada
Shada is an unaired serial of the British science fiction television series Doctor Who. It was intended to be the final serial of the 1979-80 season , but was never completed due to a strike at the BBC during filming...

.

In the Big Finish Productions
Big Finish Productions
Big Finish Productions is a British company that produces books and audio plays based, primarily, on cult British science fiction properties...

 audio play Loups-Garoux
Loups-Garoux
Loups-Garoux is a Big Finish Productions audio drama based on the long-running British science fiction television series Doctor Who.-Plot:...

, the Fifth Doctor
Fifth Doctor
The Fifth Doctor is the fifth incarnation of the protagonist of the long-running BBC television science-fiction series Doctor Who. He is portrayed by Peter Davison....

 reluctantly agrees to marry the werewolf
Werewolf
A werewolf, also known as a lycanthrope , is a mythological or folkloric human with the ability to shapeshift into a wolf or an anthropomorphic wolf-like creature, either purposely or after being placed under a curse...

 Ileana De Santos and although he gets out of it later, as in Cameca's case, a degree of mutual attraction is present. In the plays involving the Eighth Doctor, his companion Charley
Charley Pollard
Charlotte Elspeth Pollard, or simply Charley, is a fictional character played by India Fisher in a series of audio plays produced by Big Finish Productions, many of which were broadcast on BBC Radio 7, based on the long-running British science fiction television series Doctor Who. A young woman...

 confesses her romantic feelings for him in Zagreus
Zagreus
In ancient Greek religion and myth, the obscure and ancient figure of Zagreus was identified with the god Dionysus and was worshipped by followers of Orphism, whose late Orphic hymns invoke his name....

, but although he admits he loves her back at the time, it is a highly dramatic moment and the relationship does not progress beyond the platonic.

The recurring novel and audio character Iris Wildthyme
Iris Wildthyme
Iris Wildthyme is a fictional character created by writer Paul Magrs, who has appeared in short stories, novels and audio dramas from numerous publishers...

, created by Paul Magrs
Paul Magrs
Paul Magrs is a writer and lecturer. He was born in Jarrow, Tyne and Wear, England, and now lives in Manchester with his partner, author and lecturer Jeremy Hoad.-Early life:...

, is first introduced in the Short Trips
BBC Short Trips
The BBC Short Trips books were a series of short story anthologies published by BBC Books based on the television series Doctor Who, following a pattern established by Virgin Publishing's Decalog collections. Three volumes were published between March 1998 and March 2000, before the BBC decided to...

story Old Flames, is a past romantic interest of the Doctor's who continues to flirt with him whenever they meet. In the audios Iris is played by Katy Manning, the actress who had formerly played Jo Grant during the Third Doctor's era. More of the Doctor's past relationships are explored in The Infinity Doctors
The Infinity Doctors
The Infinity Doctors is a BBC Books original novel written by Lance Parkin and based on the long-running British science fiction television series Doctor Who...

and Cold Fusion
Cold Fusion (Doctor Who)
Cold Fusion is an original novel written by Lance Parkin and based on the long-running British science fiction television series Doctor Who. It features the Fifth Doctor, with Adric, Nyssa, and Tegan, immediately after Castrovalva...

.

The question of romance is sometimes side-stepped with plot devices in the spin-off media. In the 2001 BBC Books novel Father Time
Father Time (Doctor Who)
Father Time is a BBC Books original novel written by Lance Parkin and based on the long-running British science fiction television series Doctor Who. It features the Eighth Doctor and introduces the Doctor's adopted daughter Miranda.-External links:*...

by Lance Parkin
Lance Parkin
Lance Parkin is a British author, best known for writing fiction and reference books for television series, in particular Doctor Who and Emmerdale...

, the Doctor adopts an orphaned Gallifreyan-like alien called Miranda
Miranda (Doctor Who)
Miranda is a fictional character from the Eighth Doctor Adventures novel series published by BBC Books; based upon the British science fiction television series, Doctor Who. She was, for a time, the adopted daughter and companion of the Eighth Doctor...

. It is implied in the book that Miranda is actually the daughter of the Doctor himself from the far future. Miranda returns in the novel Sometime Never...
Sometime Never...
Sometime Never... is a BBC Books original novel written by Justin Richards and based on the long-running British science fiction television series Doctor Who...

by Justin Richards
Justin Richards
Justin Richards is a British writer. He has written science fiction and fantasy novels, including series set in Victorian or early-20th-century London, and also adventure stories set in the present day...

, with her own daughter Zezanne. At that novel's end, a time-active being called Soul travels into the past accompanied by Zezanne, the two believing themselves to be the Doctor and Susan
Susan Foreman
Susan Foreman is a fictional character in the British science fiction television series Doctor Who. The granddaughter and original companion of the First Doctor, she was played by actress Carole Ann Ford from 1963 to 1964, in the show's first season and the first two stories of the second season...

, respectively.

In The One Doctor
The One Doctor
The One Doctor is a Big Finish Productions audio drama based on the long-running British science fiction television series Doctor Who.- Plot :The Sixth Doctor and Mel come up against an impostor Doctor and his companion Sally-Anne....

, the Doctor kisses Sally-Anne Stubbins to bluff to the Sussyurat that he wasn't the Doctor but Banto Zane but this kiss showed no affection.

Modern-day romance

The 2005 series played with the idea of a romantic relationship between the Ninth Doctor
Ninth Doctor
The Ninth Doctor is the ninth incarnation of the protagonist of the long-running BBC television science-fiction series Doctor Who. He is played by Christopher Eccleston....

 and Rose Tyler
Rose Tyler
Rose Marion Tyler is a fictional character portrayed by Billie Piper in the long-running British science fiction television series Doctor Who, and was created by series producer Russell T Davies...

, with many characters assuming they were a couple (although they always both denied it); Rose's boyfriend Mickey Smith
Mickey Smith
Mickey Smith is a fictional character in the British science fiction television series Doctor Who, played by Noel Clarke.Mickey is introduced as the boyfriend of the Ninth and Tenth Doctor's companion Rose Tyler, and a recurring character on the programme...

 clearly views the Doctor as a romantic rival for whom Rose has, in some sense at least, left him. Both showed flashes of jealousy when the other flirted with other characters. In the episode "The Doctor Dances
The Doctor Dances
"The Doctor Dances" is an episode in the British science fiction television series Doctor Who, which was first broadcast on 28 May 2005. It is the second of a two-part story and saw Jack Harkness, played by John Barrowman, join the Doctor as a companion. The first part, "The Empty Child", was...

", the Doctor admits to Rose that he "dances" (a euphemism established for sex in the episode). In the finale for that season, "The Parting of the Ways
The Parting of the Ways
"The Parting of the Ways" is an episode in the British science fiction television series Doctor Who, which was first broadcast on 18 June 2005. It was the second episode of the two-part story that featured Christopher Eccleston making his last appearance as the Ninth Doctor...

", the Doctor even kissed Rose (although the kiss also served a plot purpose). In the same episode, the Doctor's male companion Jack Harkness
Jack Harkness
Captain Jack Harkness is a fictional character played by John Barrowman in Doctor Who and its spin-off series, Torchwood. He first appeared in the 2005 Doctor Who episode "The Empty Child" and reappeared in the remaining episodes of the 2005 series as a companion of the ninth incarnation of the...

 kisses both the Doctor and Rose in what he believes is a last goodbye. In the New Series Adventures novel Only Human by Gareth Roberts, Rose asks the Doctor how he would know that marrying for love is overrated, to which he cryptically answers, "Who says I don't? You ask the Lady Mary Wortley Montagu
Lady Mary Wortley Montagu
The Lady Mary Wortley Montagu was an English aristocrat and writer. Montagu is today chiefly remembered for her letters, particularly her letters from Turkey, as wife to the British ambassador, which have been described by Billie Melman as “the very first example of a secular work by a woman about...

." In a December 2005 interview on BBC Four
BBC Four
BBC Four is a British television network operated by the British Broadcasting Corporation and available to digital television viewers on Freeview, IPTV, satellite and cable....

, actor David Tennant
David Tennant
David Tennant is a Scottish actor. In addition to his work in theatre, including a widely praised Hamlet, Tennant is best known for his role as the tenth incarnation of the Doctor in Doctor Who, along with the title role in the 2005 TV serial Casanova and as Barty Crouch, Jr...

, who had just taken the role of the Tenth Doctor
Tenth Doctor
The Tenth Doctor is the tenth incarnation of the protagonist of the long-running BBC television science-fiction series Doctor Who. He is played by David Tennant, who appears in three series, as well as eight specials...

, described the relationship between the Doctor and Rose as "basically a love story without the shagging".

The Doctor's relationship with Rose intensifies after he regenerates into Tenth Doctor. In the 2006 series, while possessed by Lady Cassandra
Lady Cassandra
Lady Cassandra O'Brien.Δ17 is a fictional character from the long-running British science fiction television series Doctor Who. The character was voiced by Zoë Wanamaker, and was largely computer-generated, although a physical prop was also used on set....

, Rose kisses the Doctor. In "School Reunion
School Reunion (Doctor Who)
"School Reunion" is the third episode in the second series of the British science fiction television series Doctor Who. It first aired on 29 April 2006. The episode's narrative takes place some time after the events of "The Christmas Invasion"...

", the arrival of the Doctor's previous companion Sarah Jane Smith
Sarah Jane Smith
Sarah Jane Smith is a fictional character played by Elisabeth Sladen in the long-running British BBC Television science-fiction series Doctor Who and its spin-offs K-9 and Company and The Sarah Jane Adventures....

 and his reaction to seeing her again prompts jealousy and worry from Rose, and Sarah all but admits that she has long been in love with the Doctor. In the episode, "The Girl in the Fireplace
The Girl in the Fireplace
"The Girl in the Fireplace" is the fourth episode of the second series of the British science fiction television series Doctor Who. It was first broadcast on 6 May 2006, and is the only episode in the 2006 series written by Steven Moffat...

" (written by Steven Moffat
Steven Moffat
Steven Moffat is a Scottish television writer and producer.Moffat's first television work was the teen drama series Press Gang. His first sitcom, Joking Apart, was inspired by the breakdown of his first marriage; conversely, his later sitcom Coupling was based upon the development of his...

), the Tenth Doctor shares a passionate kiss and a strong romantic connection with Madame de Pompadour
Madame de Pompadour
Jeanne Antoinette Poisson, Marquise de Pompadour, also known as Madame de Pompadour was a member of the French court, and was the official chief mistress of Louis XV from 1745 to her death.-Biography:...

, who takes him away to "dance", but how far the metaphor (coined in the episode "The Doctor Dances
The Doctor Dances
"The Doctor Dances" is an episode in the British science fiction television series Doctor Who, which was first broadcast on 28 May 2005. It is the second of a two-part story and saw Jack Harkness, played by John Barrowman, join the Doctor as a companion. The first part, "The Empty Child", was...

") is taken is not seen on screen. Although Rose does not seem to exhibit jealousy towards Madame de Pompadour, she does show some jealousy with regards to a woman called Lucy whom the Doctor speaks kindly of in the next episode, "Rise of the Cybermen
Rise of the Cybermen
"Rise of the Cybermen" is an episode in the British science fiction television series Doctor Who. The episode features the return of Cybermen, where they are created on Earth itself. It is the first part of a two-part story, the concluding part being "The Age of Steel"...

". In the novel The Stone Rose
The Stone Rose
The Stone Rose is a BBC Books original novel written by Jacqueline Rayner and based on the long-running British science fiction television series Doctor Who. It was published on April 13, 2006, alongside The Feast of the Drowned and The Resurrection Casket. It features the Tenth Doctor, Rose and...

, by Jacqueline Rayner
Jacqueline Rayner
Jacqueline Rayner is a best selling British author, best known for her work with the licensed fiction based on the long-running British science fiction television series Doctor Who....

, the Doctor kisses Rose after she saves him from being petrified, although it is described as "a kiss of gratitude and joy and unspeakable pleasure at being alive." In "The Impossible Planet
The Impossible Planet
"The Impossible Planet" is an episode in the British science fiction television series Doctor Who. It is the first part of a two-part story, followed by "The Satan Pit". The TARDIS lands in a base on a planet orbiting a black hole, an allegedly impossible situation that stumps even the Doctor...

" the Doctor and Rose share an awkward moment when they have to consider settling down in one time period and Rose suggests they do so together, and she later plants a kiss for good luck on the Doctor's spacesuit prior to his descent into the pit. In "The Satan Pit
The Satan Pit
"The Satan Pit" is an episode in the British science fiction television series Doctor Who. It is the second part of a two-part story, following "The Impossible Planet". With the TARDIS seemingly lost, Rose and the remaining humans are trapped on the base with the possessed Ood, while the planet...

" the Doctor fearing for his life tells someone "If you see Rose, tell her... tell her... oh, she knows". In "Doomsday
Doomsday (Doctor Who)
"Doomsday" is the thirteenth and final episode in the second series of the revival of the British science fiction television series Doctor Who. It was first broadcast on 8 July 2006 and is the conclusion of a two-part story; the first part, "Army of Ghosts", was broadcast on 1 July 2006...

", when the Doctor says his goodbye to Rose, she finally tells him that she loves him. He begins to reply, but the message is cut off, and he is unable to reciprocate; in the episode's audio commentary, executive producer Julie Gardner
Julie Gardner
Julie Gardner is a Welsh television producer. Her most prominent work has been serving as executive producer on the 2005 revival of Doctor Who and its spin-off shows Torchwood and The Sarah Jane Adventures...

 had stated that "he absolutely was going to say it...he was going to tell her he loved her." The reunion between the Doctor and Rose in 2008 episode "The Stolen Earth
The Stolen Earth
"The Stolen Earth" is the twelfth episode of the fourth series and the 750th overall episode of the British science fiction television series Doctor Who. The episode was written by show runner and head writer Russell T Davies and is the first of a two-part crossover story; the concluding episode is...

" is stated by executive producer Russell T Davies in Doctor Who Confidential
Doctor Who Confidential
Doctor Who Confidential is a documentary series created by the British Broadcasting Corporation to complement the revival of the long-running British science fiction television series Doctor Who. Each episode was broadcast on BBC Three on Saturdays, immediately after the broadcast of the weekly...

to be a parody of romantic film conventions, because the heightened emotional content is abruptly interrupted by the Doctor being shot by a Dalek. In the next episode, "Journey's End
Journey's End
Journey's End is a 1928 drama, the seventh of English playwright R. C. Sherriff. It was first performed at the Apollo Theatre in London by the Incorporated Stage Society on 9 December 1928, starring a young Laurence Olivier, and soon moved to other West End theatres for a two-year run...

", Rose challenges the Doctor to say what he didn't get to say before, but he refuses. His half-human clone however does whisper it into Rose's ear, and the two of them kiss; Rose gets an emphatically romantic resolution to her romance storyline, as the clone-Doctor and Rose continue to live together on a parallel Earth. Gardner commented in Confidential that although the audience cannot hear, it is obvious that he is saying "I love you".

Throughout series three (2007), companion Martha Jones
Martha Jones
Martha Jones is a fictional character played by Freema Agyeman in the long-running British science fiction television series Doctor Who and its spin-off series, Torchwood. She is a companion of the Tenth Doctor in Doctor Who, replacing Rose Tyler...

 pines for the Doctor's affection ever since a kiss between them which was only used as a "genetic transfer" to distract their pursuers. She is distraught when, temporarily turned into a human in "Human Nature
Human Nature (Doctor Who episode)
"Human Nature" is the eighth episode of the third series of the revived British science fiction television series Doctor Who. It is the first episode of a two-part story written by Paul Cornell adapted from his 1995 Doctor Who novel Human Nature...

", the Doctor's human persona John Smith, falls in love with nurse Joan Redfern. She admits in "The Family of Blood
The Family of Blood
"The Family of Blood" is the ninth episode of Series 3 of the British science fiction television series Doctor Who. Preceded by "Human Nature", it is the second episode of a two-part story written by Paul Cornell adapted from his 1995 Doctor Who novel Human Nature...

" to Smith that "[the Doctor] is everything to me, and he doesn't even look at me, but I don't care, because I love him to bits, and I hope to God he won't remember me saying this". The Doctor tells Joan he is capable of everything that Smith was, but she rejects his attempt to establish a relationship with her as the Doctor. In the following episode, "Blink
Blink (Doctor Who)
"Blink" is the 10th episode of the third series of the new production of the British science fiction television series Doctor Who. It was first broadcast on 9 June 2007, and is the only episode in the 2007 series written by Steven Moffat; the episode is based on a previous short story written by...

", he refers to being "rubbish at weddings, especially my own". Martha eventually quits as the Doctor's full-time companion in the season finale "Last of the Time Lords
Last of the Time Lords
"Last of the Time Lords" is an episode of the British science fiction television series Doctor Who. It was broadcast on BBC One on 30 June 2007, and is the thirteenth and final episode of Series 3 of the revived Doctor Who series...

" because she is in love with the Doctor and he seems unable or unwilling to reciprocate; she received similar commiseration from Jack Harkness
Jack Harkness
Captain Jack Harkness is a fictional character played by John Barrowman in Doctor Who and its spin-off series, Torchwood. He first appeared in the 2005 Doctor Who episode "The Empty Child" and reappeared in the remaining episodes of the 2005 series as a companion of the ninth incarnation of the...

, who is also infatuated with him, in "The Sound of Drums
The Sound of Drums
"The Sound of Drums" is an episode of the British science fiction television series Doctor Who. It was broadcast on BBC One on 23 June 2007, and is the twelfth episode of Series 3 of the revived Doctor Who series...

". Subsequently in the 2008 series, the Doctor's friendship with Donna Noble
Donna Noble
Donna Noble is a fictional character played by Catherine Tate in the long-running British science fiction television series Doctor Who. A secretary from Chiswick, London, she is a companion of the Tenth Doctor, appearing in one scene at the end of the final episode of the 2006 series,...

 is strengthened after the infatuations from with Martha and Rose, by the knowledge that she has no romantic interest in him whatsoever. Davies' last clear allusion to the Doctor's romantic capacity occurs at the beginning of his last episode as showrunner, The End of Time
The End of Time
The End of Time: The Next Revolution in Our Understanding of the Universe, also sold with the alternate subtitle The Next Revolution in Physics, is a 1999 science book in which the author Julian Barbour argues that time exists merely as an illusion.-Auto-biography:The book begins by describing how...

. The Tenth Doctor claims to have married "Good Queen Bess, and let me tell you, her nickname is no longer... (clears throat)", a reference to Elizabeth I of England
Elizabeth I of England
Elizabeth I was queen regnant of England and Ireland from 17 November 1558 until her death. Sometimes called The Virgin Queen, Gloriana, or Good Queen Bess, Elizabeth was the fifth and last monarch of the Tudor dynasty...

's nickname "The Virgin Queen". The marriage, which calls "a mistake", explained Queen Elizabeth's reaction to seeing the Tenth Doctor in an earlier episode, "The Shakespeare Code
The Shakespeare Code
"The Shakespeare Code" is an episode of the British science fiction television series Doctor Who. It was broadcast on BBC One on 7 April 2007, and is the second episode of Series 3 of the revived Doctor Who series. According to the BARB figures this episode was seen by 7.23 million viewers and was...

". Subsequent episodes have alluded to this romantic, possibly sexual relationship.

Episodes written by Steven Moffat have continued to hint at the Doctor's romantic capacity; his stories during the Russell T Davies tenure as showrunner included the admission of a sex life in "The Doctor Dances" and the romance with Madame de Pompadour in "The Girl in the Fireplace", past marriages in "Blink", and the introduction of recurring character River Song
River Song (Doctor Who)
River Song is a fictional character played primarily by Alex Kingston in the British science-fiction series Doctor Who. River Song was introduced to the series as an experienced future companion of series protagonist the Doctor, an alien Time Lord who travels through time in his TARDIS...

 in 2008 episodes "Silence in the Library
Silence in the Library
"Silence in the Library" is the eighth episode of the fourth series of the revived British science fiction television series Doctor Who, first broadcast on 31 May 2008. It is the first of a two-part story, followed by "Forest of the Dead", and is the second two-parter Steven Moffat contributed to...

"/"Forest of the Dead
Forest of the Dead
"Forest of the Dead" is the ninth episode of the fourth series of British science fiction television series Doctor Who. It was first broadcast by BBC One on 7 June 2008...

", who indicates she is a lover of the Doctor. In his tenure as showrunner (2010-present), the series continued to imply that the Doctor will have a relationship with, and perhaps marry, River Song. Additionally, Moffat has companion Amy Pond attempt to seduce the Doctor in "Flesh and Stone
Flesh and Stone
"Flesh and Stone" is the fifth episode of the fifth series of British science fiction television series Doctor Who. Written by showrunner Steven Moffat and directed by Adam Smith, the episode was first broadcast on 1 May 2010 on BBC One...

", and in "A Christmas Carol", the Eleventh Doctor finds himself accidentally engaged to film star Marilyn Monroe
Marilyn Monroe
Marilyn Monroe was an American actress, singer, model and showgirl who became a major sex symbol, starring in a number of commercially successful motion pictures during the 1950s....

 during a visit to 1950s Hollywood. The Doctor's past romantic relationship with Elizabeth I is also alluded to in Moffat episodes "The Beast Below
The Beast Below
"The Beast Below" is the second episode of the fifth series of the British science fiction television series Doctor Who. It was written by showrunner Steven Moffat and broadcast on BBC One and BBC HD on 10 April 2010....

" and "The Wedding of River Song
The Wedding of River Song
"The Wedding of River Song" is the thirteenth and final episode of the sixth series of the British science fiction television series Doctor Who, and was first broadcast on BBC One, BBC America and Space on 1 October 2011.-Plot:...

", as well as in "Amy's Choice" by Simon Nye
Simon Nye
Simon Nye is an English comic television writer, best known for creating the hit sitcom Men Behaving Badly, writing all of the four ITV Panto, co-writing the 2006 film Flushed Away, co-writing Reggie Perrin and creating the latest adaption of William Brown in the Just William CBBC...

. In her 2010 appearances, River continues to hint at a relationship with the Doctor in her relative past and his relative future. In "The Big Bang
The Big Bang (Doctor Who)
"The Big Bang" is the 13th and final episode in the fifth series of British science fiction television series Doctor Who. It is the second part of a two-part season finale started with "The Pandorica Opens", at the end of which The Doctor is trapped, the TARDIS destroyed, and Amy Pond has been shot...

", River suggests to the Doctor that she is married to him in his personal future. When River kisses the Doctor in "Day of the Moon
Day of the Moon
"Day of the Moon" is the second episode of the sixth series of the British science fiction television series Doctor Who. Written by show runner Steven Moffat, and directed by Toby Haynes, the episode was first broadcast on 30 April 2011 on BBC One in the United Kingdom and on BBC America in the...

", it becomes clear that while this is the Doctor's first kiss with her, it is to be her last with him. In "A Good Man Goes to War
A Good Man Goes to War
"A Good Man Goes to War" is the seventh episode of the sixth series of the British science fiction television series Doctor Who, and was first broadcast on BBC One on 4 June 2011...

", River is seen returning from a date with the future Doctor, and twice calls the present-day Doctor "my love". In "Let's Kill Hitler
Let's Kill Hitler
"Let's Kill Hitler" is the eighth episode of the sixth series of the British science fiction television series Doctor Who, and was first broadcast on BBC One, Space and BBC America on 27 August 2011. It is the second episode of a two-part story, continuing stories from "A Good Man Goes to War"...

", a young River Song compares herself to Mrs. Robinson
Mrs. Robinson
"Mrs. Robinson" is a song written by Paul Simon and first performed by Simon & Garfunkel. When released as a single in 1968, it hit number one on the Billboard Hot 100 chart in the US, for their second chart-topping hit after "The Sound of Silence"...

 and kisses the Doctor; the first time in an attempt to kill him, the second to save his life. Later she resolves to study archaeology so that she can encounter the Doctor again. Because she loves him, she refuses to shoot him in "The Wedding of River Song", creating an alternate timeline. In this world, the Doctor marries River in a very brief ceremony witnessed by Amy and Rory, so that he may allow time to return to normal and go to his death, while secretly disclosing to River that he will fake his death. Later, when Dorium comments that River is incarcerated in the Stormcage for "all her days", the Doctor responds "Her days, yes, her nights...well...that's between her and me".

Discontinuities

While over the decades several revelations have been made about his background—that he is a Time Lord, that he is from Gallifrey, among others—the writers have often strived to retain some sense of mystery and to preserve the eternal question, "Doctor who?". This back-story was not rigidly planned from the beginning, but developed gradually (and somewhat haphazardly) over the years, the result of the work of many writers and producers.

This has led to continuity
Continuity (fiction)
In fiction, continuity is consistency of the characteristics of persons, plot, objects, places and events seen by the reader or viewer over some period of time...

 problems. Early histories of races such as the Dalek
Dalek
The Daleks are a fictional extraterrestrial race of mutants from the British science fiction television series Doctor Who. Within the series, Daleks are cyborgs from the planet Skaro, created by the scientist Davros during the final years of a thousand-year war against the Thals...

s were rewritten, and so on. Series writer Paul Cornell
Paul Cornell
Paul Cornell is a British writer best known for his work in television drama as well as Doctor Who fiction, and as the creator of one of the Doctor's spin-off companions, Bernice Summerfield....

, discussing continuity errors, opines that the modern series' "Time War
Time War (Doctor Who)
The Time War, more specifically called The Last Great Time War, is a conflict within the fictional universe of the long-running British science fiction television series Doctor Who...

" can explain away (or retcon) such discontinuities, giving the example of Earth's different destructions in The Ark
The Ark (Doctor Who)
The Ark is a serial in the British science fiction television series Doctor Who, which was first broadcast in four weekly parts from 5 March to 26 March 1966...

(1966) and "The End of the World
The End of the World (Doctor Who)
"The End of the World" is the second episode of Series One of the British science-fiction television series Doctor Who. Written by show runner Russell T Davies and directed by Euros Lyn, the episode was first broadcast on 2 April 2005....

" (2005). Writer and Doctor Who executive producer Steven Moffat
Steven Moffat
Steven Moffat is a Scottish television writer and producer.Moffat's first television work was the teen drama series Press Gang. His first sitcom, Joking Apart, was inspired by the breakdown of his first marriage; conversely, his later sitcom Coupling was based upon the development of his...

 has gone further, arguing that "a television series which embraces both the ideas of parallel universes and the concept of changing time can't have a continuity error—it's impossible for Doctor Who to get it wrong, because we can just say 'he changed time'".

Some of the stories during the Seventh Doctor's tenure, part of the so-called "Cartmel Masterplan
Cartmel Masterplan
The Cartmel Masterplan is a fan name for the planned Doctor Who backstory developed primarily by Andrew Cartmel, Ben Aaronovitch, and Marc Platt, which they intended to restore some of the mystery of the Doctor's background that had been lost through revelation of the existing backstory...

", were intended to deal with this issue by suggesting that much of what was believed about the Doctor was wrong and that he was a far more powerful and mysterious figure than previously thought. In both an untelevised scene in Remembrance of the Daleks
Remembrance of the Daleks
Remembrance of the Daleks is a serial in the British science fiction television series Doctor Who, which was first broadcast in four weekly parts from 5 October to 26 October 1988....

and the subsequent Silver Nemesis
Silver Nemesis
Silver Nemesis was the 25th anniversary serial of the British science fiction television series Doctor Who. It was first broadcast in the UK in three weekly parts from 23 November 1988, to 7 December 1988....

it was implied that the Doctor was "more than just another Time Lord". The suspension of the series in 1989 means that none of these hints were ever resolved. The "Masterplan" was used as a guide for the Virgin New Adventures
Virgin New Adventures
The Virgin New Adventures were a series of novels from Virgin Publishing based on the British science-fiction television series Doctor Who...

 series of novels featuring the Seventh Doctor, and the revelations about the Doctor's origins were written into the novel Lungbarrow
Lungbarrow
Lungbarrow is an original novel written by Marc Platt and based on the long-running British science fiction television series Doctor Who...

by Marc Platt
Marc Platt
Marc Platt is a British writer. He is most known for his work with the BBC science fiction television series Doctor Who.After studying catering at a technical college, Platt worked first for Trust House Forte, and then in administration for the BBC...

. However, the canonicity of these novels, like all Doctor Who spin-offs
Doctor Who spin-offs
Doctor Who spin-offs refers to material created outside of, but related to, the long-running British science fiction television series Doctor Who....

, is open to interpretation.

External links

The source of this article is wikipedia, the free encyclopedia.  The text of this article is licensed under the GFDL.
 
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