In the distant future of 1968 (!) many ships and planes are crossing the North pole to transport passengers and cargo. But lately, several ships and submarines have vanished mysteriously near the Arctic Circle.
The nuclear-powered US submarine Tigershark is sent out to investigate.
Captain Wendover (Dick Foran) and his fearless crew find themselves besieged by electrical storms, an Unidentified Floating Saucer, and lots of hairy tentacles.
Commander Richard “Reef” Holloway
Arthur Franz Captain Dan Wendover
Dick Foran Dr Carl Neilsen
Brett Halsey Lieutenant David Milburn
Paul Dubov CPO “Griff” Griffin
Bob Steele Dr Clifford Kent
Victor Varconi Julie
Joi Lansing Admiral Terhune
Selmer Jackson
