2016 Christmas special of the long-running sci-fi show starring Peter Capaldi as the twelfth Doctor. In this instalment, the Doctor and his companion Nardole (Matt Lucas) join forces with investigative journalist Lucy Fletcher (Charity Wakefield) and a masked vigilante superhero known as The Ghost (Justin Chatwin) to save New York from an alien attack. While investigating multinational organisation Harmony Shoals, the Doctor discovers its being run by alien brains plotting to take over the world by occupying the minds of its world leaders.

When the Doctor discovers a way to foil their plan, he must enlist the help of The Ghost to ensure it succeeds, who in doing so risks exposing his dual identity to Lucy.