The cast of the upcoming 'Doctor Who' Christmas Special has released a promotional video wishing fans a happy Christmas. The episode, which will air on BBC1 and BBC America, is the final one for both showrunner Steven Moffat and series star Peter Capaldi. In a recent interview, Moffat said, "It was a fantastic fun, but now it's time, more than anything, to want a new Doctor and a new showrunner and see a whole new, glittering future for the show, that's what I want to happen.
