Crash Dive

Tyrone Power

Lt. Ward Stewart

Anne Baxter

Jean Hewlett

Dana Andrews

Lt. Cdr. Dewey Connors

James Gleason

Chief Mike 'Mac' McDonnell

May Whitty

Grandmother

Harry Morgan

Brownie

Ben Carter

Oliver Cromwell Jones

Stanley Andrews

Shipwrecked Captain (uncredited)

John Archer

Curly Bowman (uncredited)

Gene Rizzi

Seaman Rizzi (uncredited)

Frederic Brunn

Q Boat Lieutenant (uncredited)

Frank Conroy

Capt. Bryson

Fred Aldrich

German Seaman

David Bacon

Lieutenant

Brooks Benedict

Angry Man at Hotel Registration Desk

Lulu Mae Bohrman

Undetermined Secondary Role