The BBC have finally confirmed that "The Magician's Apprentice" will air in the UK on BBC1 at 7.40pm on Saturday 19 September 2015.
The episode has a 50 minute running time.
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.