Original air date: 04/15/2017 Runtime: 49:48 min. Two worlds collide when the Doctor meets Bill. A chance encounter with a girl with a star in her eye leads to a terrifying chase across time and space. Bill's mind is opened to a universe that is bigger and more exciting than she could possibly have imagined. But who is the Doctor, and what is his secret mission on Earth?
Original air date: 04/29/2017 Runtime: 44:16 min. London, 1814. The entire city has turned out for the biggest Frost Fair in decades! But beneath the frozen Thames, revellers are disappearing, snatched through the ice. Pulled into the depths where a terrifying monster lurks. Will the Doctor and Bill stop the slaughter before they too are dragged into the icy waters?
Original air date: 05/27/2017 Runtime: 46:14 min. 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 enslave them. It's a terrifying race against time to save the world! Will the Doctor be forced to accept their help?
Original air date: 06/03/2017 Runtime: 44:45 min. Earth has been invaded and Bill is living alone, an isolated figure surviving in occupied Britain. The Doctor is imprisoned and appears to be on the side of the enemy, flooding the airwaves with fake news. Bill and Nardole must embark on a deadly mission to rescue the Doctor and lead the resistance against the new regime, whatever the cost.