In a Viking village, a girl named Ashildr is about to make a desperate mistake. The Mire are the deadliest mercenaries in the galaxy, famed for showing no mercy and Ashildr has just declared war on them. The Doctor and Clara have 12 hours to turn a peaceful village into strong fighters, ready for the deadly Mire.

England, 1651. The deadly Highwayman 'The Knightmare' and his sidekick stalk the dark streets of London. But when they find loot that's not of this world, they come face to face with The Doctor. Who is the Nightmare in league with? And can the Doctor avoid the hangman's noose and protect Earth from a devilish betrayal?

The Doctor and Clara, with their old friend Rigsy, find themselves in a magical alien world, hidden on a street in the heart of London.

If you took everything from him, betrayed him, trapped him, and broke both his hearts...how far might the Doctor go?