Steven 'Boley' Boleslavski
Mickey Donohue
Kansas Jackson
Mary Boleslavski
Lt. Cmdr. Clark
Lt. Bert Marton
Seaman Sarecky
Engineer Casey
Marty, a riveter
Chief Engineer
Swab with large nose
Admiral (Clark's CO)
Doctor, finding Boley unfit for further sea duty
Commandant
Japanese Submarine Commander
Japanese Sonar Man
2nd Fireman (uncredited)
Doctor #1 (uncredited)
2nd Ship Fitter (uncredited)
Austin (uncredited)
Assistant Chief Engineer (uncredited)
Radioman (uncredited)
Communications Officer (uncredited)
Ens. Johnson (uncredited)
