An 'ancient' pyramid appears overnight. Every clock in the world begins counting down to the Earth's destruction. Three opposing armies lie ready to annihilate each other. An alien race stands ready to offer humanity a deal that could save them, but also enslave them. It's a terrifying race against time to save the world. Will the Doctor be forced to accept their help?
|The Doctor||Peter Capaldi|
|Secretary General||Togo Igawa|
|The Commander||Nigel Hastings|
|Colonel Don Brabbit||Eben Young|
|Voice of the Monks||Tim Bentinck|
|Executive Producer||Brian Minchin|
|Executive Producer||Steven Moffat|