When brain-swapping aliens attack New York, the Doctor and Nardole link up with an investigative reporter and a mysterious masked superhero known only as the Ghost. Can the Doctor save Manhattan? And what will be revealed when we see behind the mask?

The Doctor is a Time Lord: a 900 year old alien with 2 hearts, part of a gifted civilization who mastered time travel. The Doctor saves planets for a living—more of a hobby actually, and the Doctor's very, very good at it.