British television science fiction
British television science fiction began when the broadcast medium was in its infancy. Despite an occasionally chequered history, popular programmes in the genre have been produced by both the BBC and the largest commercial channel, ITV...
series 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...
He was portrayed by 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:...
for seven consecutive seasons (from December 28, 1974 (Part One of 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...
) to March 21, 1981 (Part 4 of 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 remains the longest-lived incarnation of the Doctor in the show's on-screen history, counting both the classic and modern series.
Within the series' narrative, the Doctor is a centuries-old Time Lord alien from the planet 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 in time and space in his TARDIS, frequently with companions.