The image shows guest star Justin Chatwin as a superhero called Grant. Chatwin will team up with an investigative journalist, played by Charity Wakefield (Wolf Hall, The Player) to help the Doctor save New York from a deadly alien threat.
Speaking on a panel at New York Comic Con, Steven Moffat, Writer and Executive Producer, said:
"I’ve always loved superheroes and this Christmas Doctor Who dives into that world. My favourite superhero is Clark Kent. Not Superman, Clark Kent."Chatwin said of joining the Doctor Who team for the special:
"Working with the amazing people at Doctor Who has been one of the most fun and rewarding projects I’ve ever had the pleasure of being involved with."As well as the welcome return of Matt Lucas as Nardole, the 60 minute episode was written by Steven Moffat, Executive Produced by Brian Minchin, Produced by Peter Bennett and Directed by Ed Bazalgette and will also feature Adetomiwa Edun, Aleksandar Jovanovic and Logan Hoffman.
But enough of all that information, here's what you really clicked on this post to see: the trailer!