The BBC have released the official story synopsis for episode 7, The Pyramid at the End of the World, written by Peter Harness and Steven Moffat, and directed by Daniel Nettheim.
A 5,000 year-old Pyramid stands at the centre of a war zone, where the Chinese, Russian and American armies are about to clash. There are many problems with that, but the one that intrigues the Doctor is this: there wasn’t a pyramid there yesterday.
The Doctor, Bill and Nardole face an alien invasion unlike any other, and before conquest can begin, these aliens need the consent of the human race…
The Pyramid at the End of the World airs Saturday 27th May on BBC One, with the time to be confirmed.