Synopsis: 1974-1981, Fourth Doctor, Doctor Who is a British science fiction television programme produced by the BBC. The programme depicts the adventures of a mysterious and eccentric Time Lord known as the Doctor who travels through time and space in his time machine, the TARDIS (an acronym for Time And Relative Dimension(s) In Space), which normally appears from the exterior to be a blue 1950s British police box. With his companions, he explores time and space, faces a variety of foes and saves civilizations, helping people and righting wrongs.