Season 10, Episode 05 – Oxygen
The Doctor, Bill and Nardole answer a distress call in deep space, and find themselves trapped on board space station Chasm Forge. All but four of the crew have been murdered – and the dead are still walking! In a future where oxygen is sold by the breath, and space suits are valued more highly than their occupants, the Tardis crew battle for survival against the darkest evil of all.
The Doctor is an alien Time Lord from the planet Gallifrey who travels through all of time and space in his TARDIS. He has a long list of friends and companions who have shared journeys with him. Instead of dying, the Doctor is able to “regenerate” into a new body, taking on a new personality with each regeneration. Twelve actors, plus John Hurt, have played The Doctor thus far.