The BBC have released a new trailer for this year's Doctor Who Special, "The Return of Doctor Mysterio."
With brain-swapping aliens poised to attack, the Doctor and Nardole link up with an investigative reporter and a mysterious figure known only as The Ghost. Can the Doctor save Manhattan? And what will be revealed when we see behind the mask?
Cast: Peter Capaldi (The Doctor), Matt Lucas (Nardole), Justin Chatwin (Grant), Charity Wakefield (Lucy), Tomiwa Edun (Mr Brock), Aleksandar Jovanovic (Dr Sim) and Logan Huffman.
The 60-minute Doctor Who Christmas Special is written by Steven Moffat, Executive Produced by Brian Minchin, Produced by Peter Bennett and Directed by Ed Bazalgette (Poldark). It was shot in Cardiff at BBC Wales Roath Lock Studios.