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The man they called the 'human torpedo' - the secret underwater marauder who hit like no man hit before!

Lieutenant Braden discovers that Sally, the woman he's been falling in love with, has actually been checking out his qualifications to be a U.S. Navy frogman. He must put his personal life behind him after being assigned to be smuggled into a Japanese-held island via submarine to photograph radio codes.

James Garner

Lt. J. G. Kenneth M. Braden

Edmond O'Brien

Commander Paul Stevenson

Andra Martin

Sally Johnson

Alan Hale Jr.

Lt. Pat Malone

Edd Byrnes

Pharmacist Mate Ash

Clifford Kawada

Japanese (uncredited)

Carleton Carpenter

Lt. Phil Carney

Richard Bakalyan

Seaman Peck

William Leslie

Lt. Doherty

Frank Gifford

Ensign Cy Mount

Henry Kulky

Chief Petty Officer York

Sean Garrison

Seaman Floyd

Warren Oates

Seaman Kovacs

Frank Watkins

Gruber (uncredited)

Peggy Moffitt

Jukebox Girl

Bernie Hamilton

Seaman Weary