Exclusive: Steven Moffat tells SFX that this year's Christmas special will dig into one of Doctor Who's core philosophies

But this is Moffat we are talking about, so you should still expect plenty of emotion too. The writer teases: "It's got your Christmas whimsy in there, so I suppose it leans towar

Doctor Who fans shouldn't worry too much about this year's Christmas special being too dark, after all, it is called Joy to the World, as Steven Moffat has promised it is more lighthearted than his previous work.

Doctor Who is bringing back a classic villain in its Christmas special that will add fun to the holiday episode.