Carlton Your Doorman was an animated television special starring the (previously) unseen doorman

Doorman (profession)

A doorman is an individual hired to provide courtesy and security services at a residential building or hotel. They are particularly common in urban luxury highrises. At a residential building, a doorman is responsible for opening doors and screening visitors and deliveries...

 Carlton from the sitcom Rhoda

Rhoda

Rhoda is an American television sitcom, starring Valerie Harper, which ran for five seasons, from 1974 to 1978 airing in 109 episodes. The show was a spin-off from The Mary Tyler Moore Show, in which Harper between the years 1970 and 1974 had played the role of Rhoda Morgenstern, a spunky,...

. As on Rhoda, Carlton's voice was provided by Lorenzo Music

Lorenzo Music

Lorenzo Music was an American actor, voice actor, writer, television producer and musician. His best-known roles include voicing the animated cartoon cat Garfield, and Carlton the doorman on the CBS sitcom Rhoda...

. This was the only animated production from MTM Enterprises

MTM Enterprises

MTM Enterprises was an American independent production company established in 1969 by Mary Tyler Moore and her then-husband Grant Tinker to produce The Mary Tyler Moore Show for CBS...

 (although The Duck Factory

The Duck Factory

The Duck Factory is a 1984 NBC television series produced by MTM Enterprises that is perhaps most notable for being Jim Carrey's first lead role in a Hollywood production....

- a sitcom set in an animation production company - included cartoon segments, and the closing credits of many MTM series included animated clothing and accessories superimposed on Mimsie the Cat).

It was a pilot for a weekly series which never materialized. The show aired on CBS

CBS

CBS Broadcasting Inc. is a major US commercial broadcasting television network, which started as a radio network. The name is derived from the initials of the network's former name, Columbia Broadcasting System. The network is sometimes referred to as the "Eye Network" in reference to the shape of...

 May 21, 1980, piggybacking the Chuck Jones

Chuck Jones

Charles Martin "Chuck" Jones was an American animator, cartoon artist, screenwriter, producer, and director of animated films, most memorably of Looney Tunes and Merrie Melodies shorts for the Warner Bros. Cartoons studio...

 special Bugs Bunny's Bustin' Out All Over

Bugs Bunny's Bustin' Out All Over

Bugs Bunny's Bustin' Out All Over is a Looney Tunes television special which aired on May 21, 1980. It features three new cartoons at the time, which featured Bugs Bunny and other Looney Tunes characters. The theme of this special is Springtime...

.

It was revealed in this animated special that Carlton was a relatively young man, with shoulder-length blond hair & mustache.