During World War II, Captain Cassidy and his crew of submariners are ordered into Tokyo Bay on a secret mission. They are to gather information in advance of the planned bombing of Tokyo. Along the way, the crew learn about each other as they face the enemy and some of them lose their lives.

Cary Grant

Captain Cassidy

John Garfield

Wolf

Alan Hale

'Cookie' Wainwright

John Ridgely

Reserve Officer Raymond

Dane Clark

Tin Can

Warner Anderson

Andy

William Prince

Pills

Robert Hutton

Tommy Adams

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