'The Squall feed on psychic energy, absorbing it to establish new hives. They spread like a plague, a contagion of the whole universe. And if they are not stopped they will strip the Earth clean...' London 1910: An unsuspecting thief gets more than he bargained for when he breaks into a house in Kensington. He finds himself confronted by horrific, grey-skinned creatures that are waiting to devour his mind. London 3189: An unimaginably ancient city. The remains of an android are dredged from the Thames. It's one of the latest models, only just developed. But it's been in the water for over a thousand years. And when the android is reactivated, it has a message - a warning that can only be delivered to a man named the Doctor. The Doctor and his friends must solve a mystery that has spanned over a thousand years. Travelling backwards and forwards in time, they must unravel the threads of an ancient plot. If they fail, the deadly alien Squall will devour the world... A thrilling all-new adventure featuring the Doctor, Amy and Rory, as played by Matt Smith, Karen Gillan and Arthur Darvill in the spectacular hit series from BBC Television.