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?

• BBC Cymru Wales
• Peter Capaldi
• Matt Lucas
• Justin Chatwin
• Charity Wakefield
• Tomiwa Edun
• Aleksandar Jovanović
• Logan Hoffman
• Daniel Lorente