The Doctor (Doctor Who)
The Doctor is the title character in the long-running BBC science fiction television programme "Doctor Who". Since the show's inception in 1963, the character has been portrayed by thirteen lead actors. In the programme, "the Doctor" is the alias assumed by a centuries-old alien—a Time Lord from the planet Gallifrey—who travels through space and time in the TARDIS, frequently with companions. The transition to each succeeding actor is explained within the show's narrative through the plot device of "regeneration", a biological function of the Time Lord race that allows a change of cellular structure and appearance with recovery following a potentially fatal injury.
Inferno (Doctor Who)
Inferno is the fourth and final serial of the seventh season of the British science fiction television series "Doctor Who", which was first broadcast in seven weekly parts on BBC1 from 9 May to 20 June 1970. The serial remains the last time a "Doctor Who" story was transmitted in seven episodes. This serial was also the last regular appearance of Caroline John in the role of Liz Shaw.