Cold War
- Episode aired Apr 13, 2013
- TV-PG
- 41m
The Doctor and Clara find themselves on a Russian submarine that is falling to the bottom of the ocean because of an attack by a rogue Martian warrior that's still on board.The Doctor and Clara find themselves on a Russian submarine that is falling to the bottom of the ocean because of an attack by a rogue Martian warrior that's still on board.The Doctor and Clara find themselves on a Russian submarine that is falling to the bottom of the ocean because of an attack by a rogue Martian warrior that's still on board.