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!
> Order Series 7 Part 2 on DVD on Amazon.
‘Cold War’ airs at 6pm on Saturday 13 April on BBC One.
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> Buy Series 7 Part 1 on DVD on Amazon.
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