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 (as 13
total Doctors have appeared through the course of the British series).
In the programme, "the Doctor" is the alias assumed by a millennia-old
alien called a Time Lord 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.A number of other actors have
played the character in stage and audio plays, as well as in various
film and television productions. The Doctor has been well received by
the public, with an enduring popularity leading The Daily Telegraph to
dub the character "Britain's favourite alien". The Doctor has also
been featured in films and a vast range of spin-off novels, audio
dramas and comic strips.On 25 December 2017, Jodie Whittaker made her
first appearance as the Thirteenth Doctor at the end of the 2017
Christmas special "Twice Upon a Time".Within the fictional narrative,
the Doctor is a Time Lord with somewhat unknown origins who travels
through time and space in a stolen dimensionally transcendental â€"
"bigger on the inside" â€" time machine: the TARDIS (Time And Relative
Dimension(s) In Space) which takes the exterior form of a 1963 police
telephone call box, and retains the appearance throughout the
programme. Human companions accompany the Doctor through his
adventures who serve as audience surrogate characters to ask questions
which allow the Doctor to provide relevant exposition. The Doctor (Doctor Who) Biography, NetWorth, Height, Age, Weight, Family, Married, Son, Daughter