Watch Doctor Who Season 7 Episode 8 Online
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- COUNTRIES: Canada,United Kingdom
- Subtitles: English
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!