You wait months for new Doctor Who, then you can hardly ever escape it. The BBC have released the first trailer for this year's Christmas special, "The Time of The Doctor", which will see Matt Smith's incarnation regenerate into Peter Capaldi's twelfth. This trailer is perhaps most notable for showing us guest-star villain Orla Brady (Mistresses, Fringe) and revealing The Doctor appears to have fallen into a trap during 'the siege of Trenzalore'. Oh, and there are Daleks, Cybermen, Weeping Angels and The Silence to contend with. It's going to be a busy Christmas Day!