6.00/10 2013-12-12 58 minutes.HDThroughout the 1970s and 80s, the front line of the Cold War was hidden beneath the ocean. Submariners from three navies - American, Soviet and British - played a deadly game of cat and mouse in a secret war of espionage and intimidation. The nuclear balance between East and West was constantly shifting.An: 2013Studio: BBC TwoPays: Soviet Union, United Kingdom, United States of America