The Cold War – Saturday 13th April BBC One 6pm – 6:45pm

The Doctor and Clara land on a damaged Russian submarine in 1983 as it spirals out of control into the ocean depths.

To make matters worse, an alien creature is loose on board, having escaped from a block of Arctic ice – and with tempers flaring and a cargo of nuclear weapons on board, it’s not just the crew but the whole of humanity at stake.

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