The Twelfth Doctor is an incarnation of the Doctor, the protagonist of
the BBC science fiction television programme Doctor Who. He is
portrayed by Scottish actor Peter Capaldi. As with previous
incarnations of the Doctor, the character has also appeared in other
Doctor Who spin-offs.Within the series' narrative, the Doctor is a
millennia-old alien Time Lord from the planet Gallifrey who travels in
time and space in the TARDIS, frequently with companions. At the end
of life, the Doctor regenerates; as a result, the physical appearance
and personality of the Doctor changes. Capaldi's portrayal of the
Doctor is a spiky, brusque, contemplative, and pragmatic character who
conceals his emotions in the course of making tough and sometimes
ruthless decisions.This incarnation's companions include school
teacher Clara Oswald (Jenna Coleman), canteen assistant and student
Bill Potts (Pearl Mackie) and alien Nardole (Matt Lucas). He also made
a guest appearance in the Doctor Who spin-off series Class, appearing
in the show's first episode. Twelfth Doctor Biography, NetWorth, Height, Age, Weight, Family, Married, Son, Daughter