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.
Doctor Who (series 1)
Under producer Davies, the new series had a faster pace than those of the classic series. Rather than four to six-part serials of 25-minute episodes, most of the Ninth Doctor's stories consisted of individual 45-minute episodes, with only three stories out of ten being two-parters. The thirteen episodes were, however, loosely connected in a series-long story arc which brought their disparate threads together in the series finale. Davies took cues from American fantasy television series such as "Buffy the Vampire Slayer" and "Smallville", most notably "Buffy"s concepts of series-long story arcs and the "Big Bad". Also, like the original series, stories often flowed directly into one another or were linked together in some way. Notably, in common only with the seventh and twenty-sixth seasons of the original series, every story of the season takes place on or near Earth. This fact is directly addressed in the original novel "The Monsters Inside", in which Rose and the Doctor joke about the fact that all their adventures to date have taken place on Earth or on neighbouring space stations.