The episode has a 50 minute timeslot, and will end at 8.30pm. The Magician's Apprentice, penned by head writer Steven Moffat, will air on the same day on BBC America at 9/8C.
Where is the Doctor? When the skies of Earth are frozen by a mysterious alien force, Clara needs her friend. But where is the Doctor, and what is he hiding from?
As past deeds come back to haunt him, old enemies will come face-to-face, and for the Doctor and Clara survival seems impossible.[Source: BBC]