The Doctor and Clara land on a damaged Russian submarine in 1983 as it spirals out of control into the ocean depths. An alien creature is loose on board, having escaped from a block of Arctic ice. With tempers flaring and a cargo of nuclear weapons on board, it’s not just the crew but the whole of humanity at stake!

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.

It’s Christmas Day on a remote human colony and the Doctor is hiding from Christmas Carols and Comedy Antlers. But when a crashed spaceship calls upon the Doctor for help, he finds himself recruited into River Song’s squad and hurled into a fast and frantic chase across the galaxy.