Doctor Who is a long running BBC science fiction show centered around The Doctor, an alien Time Lord from the planet Gallifrey who steals a TARDIS (Time and Relative Dimension in Space), which resembles a blue Police Box on the outside but is much bigger on the inside — and runs away through space and time. Through a process known as regeneration, the Doctor takes on new faces and personalities — and the show new actors. The Doctor typically travels with a human companion or companions who help him on his journey and temper his darker, more destructive side.

Doctor Who is on its 8th modern season and currently stars Peter Capaldi as the eleventh Doctor.