What scares the grand old man of time? What horrors lurk under his bed? Ghosts of the past and future crowd into the lives of The Doctor and Clara; a terrified caretaker in a children's home, the last man standing in the universe, and a little boy who doesn't want to join the army...

The Bank of Karabraxos is the deadliest bank in the cosmos - only a fool or genius would tempt to rob it. Fortunately, for The Doctor, he's both. But nothing even The Doctor has encountered can prepare them for the Teller: a creature of terrifying power that can detect guilt.

In the near future, The Doctor and Clara arrive on a decrepit shuttle making a suicide mission to the Moon. Crashing on the lunar surface, they find a mining base full of eviscerated corpses, spider-like creatures scuttling about in the dark, and a terrible dilemma.

Aboard the most beautiful train in history, speeding among the stars of the future, a legend is stalking the passengers. Once you see the Mummy, you have 66 seconds to live. Clara sees The Doctor at his deadliest and most ruthless - and finally she realises she's made the right decision. Because this is their last adventure: it's time to say goodbye to the Time Lord.

The Doctor and Clara save the frightened crew from a threat in an underwater base, but the Doctor questions the haunting.

An alien warlord sets a twisted plan in motion in order to ensure his survival on a remote Army outpost, and the Doctor may have to do something unthinkable.

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?

Trapped in a world unlike any other he has seen, the Doctor faces the greatest challenge of his many lives. One final test. And he must face it alone.

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