Thunder Afloat

Wallace Beery

John Thorson

Chester Morris

'Rocky' Blake

Virginia Grey

Susan Thorson

Douglass Dumbrille

District Commander (as Douglas Dumbrille)

Carl Esmond

U-Boat Captain

Clem Bevans

'Cap' Finch

John Qualen

Milo

Regis Toomey

Ives

Howard Hickman

Surgeon

Frank Faylen

Recruiting officer

Leon Ames

Recruiting officer

Addison Richards

Admiral, Admiral Ross

Doodles Weaver

Sailor

Henry Victor

German U-Boat Officer

Hans Joby

U-Boat Petty Officer

Henry Hunter

Ensign Dyer

Jonathan Hale

Admiral Girard

Arthur Belasco

Fisherman

Joseph E. Bernard

Fisherman

Wade Boteler

Recruiting Officer

Al Bridge

Fisherman

Rand Brooks

Listener

Don Castle

Radio Operator

Jack Chapin

Sailor

Tom Chatterton

Lieutenant

Jack Clifford

Captain

Jules Cowles

Man with Finch (uncredited)

Leigh De Lacey

Mrs. Gill

Joe De Stefani

Fisherman

Edgar Dearing

Petty Officer

Richard Elmore

Lookout

Budd Fine

Survivor

Allen Fox

Lookout

Frederick Lee

Sailor

Eddie Hart

Fisherman

Edward Hearn

Fisherman

Earle Hodgins

Fisherman

Clarke Jennings

Wireless Operator

Payne B. Johnson

Boy

Charles Jordan

Signalman

Lew Kelly

Sailor

Jack Kennedy

Fisherman

Milton Kibbee

Fisherman

Claire McDowell

Nurse

Larry McGrath

Radio Operator

Roger Moore

Orderly

Philip Morris

Fisherman

Forbes Murray

Naval Aide

Frank Orth

Old Sailor in Bilge Area

Syd Saylor

Wireless Operator Sending Coded Message

Harold Schlickenmayer

Engineer

Ferdinand Schumann-Heink

German Operator

Hans Schumm

German Sailor Looking for Wireless

Harry Semels

Cook on Tugboat

Lee Shumway

Sailor

Robert R. Stephenson

German Sailor

Harry Strang

Shore Patrol Sailor

Walter Thiele

Young German Sailor

Emmett Vogan

Junior Officer Standing by Map

Wolfram Von Bock

German Officer

Hans von Morhart

German Sailor

John F. Seitz

George B. Seitz

Director

Wells Root

Ralph Wheelwright

Harvey S. Haislip

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