Doctor Who is a television show.
In the long-running BBC television science fiction programme Doctor Who and related works , the term `` companion '' refers to a character who travels with , or shares the adventures of the Doctor . Doctor Who is a British science-fiction television programme produced by the BBC since 1963 . In the long running British science fiction television series Doctor Who , regeneration is a biological ability exhibited by the Time Lords , a race of fictional humanoids originating on the planet Gallifrey . The Time Lords are a fictional , ancient extraterrestrial people in the British science fiction television series Doctor Who , of which the series ' protagonist , the Doctor , is a member .