The Twelfth Doctor is an incarnation of the Doctor, the protagonist of the BBC science fiction television series Doctor Who.

Peter Capaldi plays him.

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 change. 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. Over time, he becomes kinder, more compassionate, and more openly showcases his selflessness.

This incarnation’s companions include school teacher Clara Oswald (Jenna Coleman), who had traveled with his previous incarnation, 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.

Sometimes, on a good day, if i try very hard, i’m not some old time lord who ran away, I’m the doctor

12th Doctor