Edward G. Robinson
Steven 'Boley' Boleslavski
Glenn Ford
Mickey Donohue
Edgar Buchanan
Kansas Jackson
Marguerite Chapman
Mary Boleslavski
Regis Toomey
Lt. Cmdr. Clark
Warren Ashe
Lt. Bert Marton
Leo Gorcey
Seaman Sarecky
Edward Brophy
Engineer Casey
Eddy Waller
Marty, a riveter
Roger Clark
Chief Engineer
Curt Bois
Swab with large nose
Kenneth MacDonald
Admiral (Clark's CO)
Charles D. Brown
Doctor, finding Boley unfit for further sea duty
Cliff Clark
Commandant
Richard Loo
Japanese Submarine Commander
Benson Fong
Japanese Sonar Man
Lloyd Bridges
2nd Fireman (uncredited)
Tris Coffin
Doctor #1 (uncredited)
Bud Geary
2nd Ship Fitter (uncredited)
Eddie Hall
Austin (uncredited)
Charles McGraw
Assistant Chief Engineer (uncredited)
Milburn Stone
Radioman (uncredited)
Dennis Moore
Communications Officer (uncredited)
Larry Parks
Ens. Johnson (uncredited)
Shirley Patterson
Bigbee's Girl (uncredited)
Gene Rizzi
Survivor (uncredited)
Dean Benton
Moore
Lynton Brent
Doctor
Stanley Brown
Marine / Fireman
Eddy Chandler
Chief Gunner's Mate
Edmund Cobb
1st Workman
Eddie Dew
Survivor
Lester Dorr
1st Ship Fitter
Al Hill
Knife-Eating Sailor
David Holt
Sobbing Sailor
Bobby Jordan
Sobbing Sailor
Mauritz Hugo
Survivor
George Magrill
Marine
Robert McKenzie
Justice of the Peace
Frank Melton
Doctor
John Merton
Chief Quartermaster
Gertrude Messinger
Girl
Pat O'Malley
Postman
Mickey Rentschler
J.V. Talker
Addison Richards
Ship Building Foreman
Ronald R. Rondell
Survivor
Virginia Sale
Kansas' Dance Partner
Charles Sherlock
Chief Machinist's Mate
John Tyrrell
Marine
Dale Van Sickel
Sailor
Dorothy Vernon
Justice of the Peace's Wife
Pierre Watkin
Admiral