Dr. John Truman Carter III, portrayed by Noah Wyle

Noah Wyle

Noah Strausser Speer Wyle is an American film, television and theatre actor. He is best known for his role as Dr. John Truman Carter III in the Medical drama ER. He has also played Steve Jobs in the 1999 docudrama Pirates of Silicon Valley and Flynn Carsen in The Librarian franchise...

, is a fictional character from the television series ER

ER (TV series)

ER is an American medical drama television series created by novelist Michael Crichton that aired on NBC from September 19, 1994 to April 2, 2009. It was produced by Constant c Productions and Amblin Entertainment, in association with Warner Bros. Television...

. The character, called simply "Carter" by most other characters, was introduced in the pilot episode and appeared for eleven consecutive seasons. Wyle decided to leave the show as a regular character at the conclusion of season 11, despite offers to stay. He cited a budding family and an already lengthy tenure on the show as reasons.