A British submarine on patrol is accidentally rammed by a merchant ship, that tears a big hole in in sub which sinks trapping the crew.

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Main Cast: John Batten, Sydney Seaward, James Enstone, Syd Crossley, John Hunt, Edward Gee, Charles Peachey, Atholl Fleming, Lesley Wareing

Director: Walter Summers

Writers: John F. Meed, Leslie Norman

Editor: Leslie Norman

Cinematographers: Jack Parker, Horace Wheddon

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