Thunder Afloat

Wallace Beery

as John Thorson

Chester Morris

as 'Rocky' Blake

Virginia Grey

as Susan Thorson

Douglass Dumbrille

as District Commander

Carl Esmond

as U-Boat Captain

Clem Bevans

as 'Cap' Finch

John Qualen

as Milo

Regis Toomey

as Ives

Henry Victor

as German U-Boat Officer

Addison Richards

as Admiral Ross

Hans Joby

as U-Boat Petty Officer

Henry Hunter

as Ensign Dyer

Jonathan Hale

as Admiral Girard

Leon Ames

as Recruiting Officer (uncredited)

Arthur Belasco

as Fisherman (uncredited)

Joseph E. Bernard

as Fisherman (uncredited)

Wade Boteler

as Recruiting Officer (uncredited)

Al Bridge

as Fisherman (uncredited)

Rand Brooks

as Listener (uncredited)

Don Castle

as Radio Operator (uncredited)

Jack Chapin

as Sailor (uncredited)

Tom Chatterton

as Lieutenant (uncredited)

Jack Rube Clifford

as Captain (uncredited)

Jules Cowles

as Man with Finch (uncredited)

Leigh De Lacey

as Mrs. Gill (uncredited)

Joe De Stefani

as Fisherman (uncredited)

Edgar Dearing

as Petty Officer (uncredited)

Richard Elmore

as Lookout (uncredited)

Frank Faylen

as Recruiting Officer (uncredited)

Budd Fine

as Survivor (uncredited)

Allen Fox

as Lookout (uncredited)

Frederick Lee

as Sailor (uncredited)

Eddie Hart

as Fisherman (uncredited)

Edward Hearn

as Fisherman (uncredited)

Howard Hickman

as Surgeon (uncredited)

Earle Hodgins

as Fisherman (uncredited)

Clarke Jennings

as Wireless Operator (uncredited)

Payne B. Johnson

as Boy (uncredited)

Charles Jordan

as Signalman (uncredited)

Lew Kelly

as Sailor (uncredited)

Jack Kennedy

as Fisherman (uncredited)

Milton Kibbee

as Fisherman (uncredited)

Claire McDowell

as Nurse (uncredited)

Larry McGrath

as Radio Operator (uncredited)

Roger Moore

as Orderly (uncredited)

Philip Morris

as Fisherman (uncredited)

Forbes Murray

as Naval Aide (uncredited)

Frank Orth

as Old Sailor in Bilge Area (uncredited)

Syd Saylor

as Wireless Operator Sending Coded Message (uncredited)

Harold Schlickenmayer

as Engineer (uncredited)

Ferdinand Schumann-Heink

as German Operator (uncredited)

Hans Schumm

as German Sailor Looking for Wireless (uncredited)

Harry Semels

as Cook on Tugboat (uncredited)

Lee Shumway

as Sailor (uncredited)

Robert R. Stephenson

as German Sailor (uncredited)

Harry Strang

as Shore Patrol Sailor (uncredited)

Walter Thiele

as Young German Sailor (uncredited)

Emmett Vogan

as Junior Officer Standing by Map (uncredited)

Wolfram Von Bock

as German Officer (uncredited)

Hans von Morhart

as German Sailor (uncredited)

Doodles Weaver

as Sailor (uncredited)