Thomas Stewart Baker (born 20 January 1934) is an English actor. He is best known for his portrayal of the fourth incarnation of the Doctor in the science fiction series Doctor Who from 1974 to 1981, a longer tenure than any other actor, and for the narration of the comedy series Little Britain. Baker's voice, which has been described as "sonorous", was voted the fourth-most recognisable in the UK.
Baker narrated an abridged audiobook version of The Dark Portal, the first novel in Robin Jarvis' Deptford Mice trilogy. It was released as a set of two cassette tapes by Macdonald Young Books in 1995 and then re-released by Hodder Headline in 2001.