Edward G. Robinson as Steven 'Boley' Boleslavski

Glenn Ford as Mickey Donohue

Edgar Buchanan as Kansas Jackson

Marguerite Chapman as Mary Boleslavski

Regis Toomey as Lt. Cmdr. Clark

Warren Ashe as Lt. Bert Marton

Leo Gorcey as Seaman Sarecky

Edward Brophy as Engineer Casey

Eddy Waller as Marty, a riveter

Roger Clark as Chief Engineer

Curt Bois as Swab with large nose

Kenneth MacDonald as Admiral (Clark's CO)

Charles D. Brown as Doctor, finding Boley unfit for further sea duty

Cliff Clark as Commandant

Richard Loo as Japanese Submarine Commander

Benson Fong as Japanese Sonar Man

Lloyd Bridges as 2nd Fireman (uncredited)

Tris Coffin as Doctor #1 (uncredited)

Bud Geary as 2nd Ship Fitter (uncredited)

Eddie Hall as Austin (uncredited)

Charles McGraw as Assistant Chief Engineer (uncredited)

Milburn Stone as Radioman (uncredited)

Dennis Moore as Communications Officer (uncredited)

Larry Parks as Ens. Johnson (uncredited)

Shirley Patterson as Bigbee's Girl (uncredited)

Gene Rizzi as Survivor (uncredited)

Frank Beckford as Yeoman

Dean Benton as Moore

Lynton Brent as Doctor

Roy Brent as Sailor

Stanley Brown as Marine / Fireman

George Bruggeman as Cook

Alma Carroll as Sailor's Girl Friend

Eddy Chandler as Chief Gunner's Mate

Edmund Cobb as 1st Workman

Eddie Coke as Storekeeper

Eleanor Counts as Sarecky's Girl

Roy Darmour as Pharmacist's Mate

Eddie Dew as Survivor

Lester Dorr as 1st Ship Fitter

John Estes as Helmsman

Jerry Franks Jr. as Pharmacist's Mate / Bridge Talker

Jack Gardner as Sailor

Lloyd Hanson as Collins

Al Hill as Knife-Eating Sailor

David Holt as Sobbing Sailor

Bobby Jordan as Sobbing Sailor

David S. Horsley as Thomas

Mauritz Hugo as Survivor

Stephen Keyes as Seaman Guard

George Magrill as Marine

Don McGill as Survivor

Robert McKenzie as Justice of the Peace

David McKim as Signalman

Frank Melton as Doctor

John Merton as Chief Quartermaster

Gertrude Messinger as Girl

Bob Milton as J.V. Talker

Pat O'Malley as Postman

Paul Perry as Doctor

Don Peters as Helmsman

Neil Reagan as Lt. J.C. Randolph

Mickey Rentschler as J.V. Talker

Addison Richards as Ship Building Foreman

Ronald R. Rondell as Survivor

Clark Ross as Pharmacist's Mate

Virginia Sale as Kansas' Dance Partner

Charles Sherlock as Chief Machinist's Mate

George Sherwood as Workman

Mel Shubert as James

John Tyrrell as Marine

Dale Van Sickel as Sailor

Dorothy Vernon as Justice of the Peace's Wife

Pierre Watkin as Admiral

Frank Wayne as Pharmacist's Mate

Craig Woods as Bigbee

Billy Young as Storekeeper