Jagare

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