Humphrey Bogart as Lt. Joe Rossi

Raymond Massey as Capt. Steve Jarvis

Alan Hale as Boats O'Hara

Julie Bishop as Pearl O'Neill

Ruth Gordon as Mrs. Sarah Jarvis

Sam Levene as Abel 'Chips' Abrams

Dane Clark as Johnnie Pulaski

Peter Whitney as Whitey Lara

Dick Hogan as Cadet Robert Parker

Louis Adlon as German Ensign (uncredited)

Iris Adrian as Jenny O'Hara (uncredited)

Frank Alten as German (uncredited)

Kirk Alyn as Brazilian Gun Captain (uncredited)

C.E. Anderson as Bearded Lieutenant Commander (uncredited)

Tod Andrews as Ahearn (uncredited)

Louis V. Arco as Submarine Commander (uncredited)

Warren Ashe as U.S. Sailor (uncredited)

Hooper Atchley as Lieutenant-Commander (uncredited)

Irving Bacon as Bartender (uncredited)

Leah Baird as Mother (uncredited)

Joseph E. Bernard as Ed (uncredited)

Monte Blue as Seaman (uncredited)

Stanley Blystone as U.S. Commander (uncredited)

Sven Hugo Borg as Norwegian Seaman (uncredited)

Chick Chandler as Goldberg (uncredited)

Eddy Chandler as Seaman (uncredited)

Alex Chivra as Lieutenant-Commander at Meeting (uncredited)

Eddie Coke as Signal Man (uncredited)

Alec Craig as McGonigle (uncredited)

Hal Craig as Ship Officer (uncredited)

Albert D'Arno as German Sailor (uncredited)

George Davis as German Sailor (uncredited)

Jean Del Val as Capt. La Pricor (uncredited)

Janna DeLoos as Murmansk Welcomer (uncredited)

Eddie Dew as Lieutenant-Commander at Meeting (uncredited)

Donald Douglas as Lieutenant-Commander (uncredited)

Warren Douglas as Navy Pilot (uncredited)

Arthur Dulac as French Seaman (uncredited)

Johnny Duncan as Sailor (uncredited)

Ralph Dunn as Quartermaster (uncredited)

Carl Ekberg as Dutch Seaman (uncredited)

John Epper as German Lieutenant-Commander (uncredited)

James Flavin as Merchant Marine School Lieutenant-Commander (uncredited)

Ross Ford as Ensign Speaker (uncredited)

William Forrest as Lieutenant-Commander (uncredited)

Art Foster as Pete Larson (uncredited)

Eddie Foster as American Seaman (uncredited)

Arno Frey as German Pilot (uncredited)

Hans Fuerberg as German Officer (uncredited)

Frederick Giermann as German Submarine Captain (uncredited)

Art Gilmore as President Franklin D. Roosevelt (voice) (uncredited)

Christine Gordon as Murmansk Welcomer (uncredited)

Kit Guard as Unemployed Seaman (uncredited)

Henry Guttman as Nazi Submarine Officer (uncredited)

William Haade as Loudmouth Saloon Patron (uncredited)

Creighton Hale as Sparks (uncredited)

Eddie Hall as Casino Club Patron at Loudmouth's Table (uncredited)

Ernst Hauessermann as German (uncredited)

Lew Hicks as Lieutenant-Commander at Meeting (uncredited)

Stuart Holmes as Lieutenant-Commander at Meeting (uncredited)

William Hopper as Canadian Soldier (uncredited)

Ted Jacques as Ship Officer (uncredited)

Lew Kelly as Tony Gonzales (uncredited)

Fred Kelsey as Joe (uncredited)

J.M. Kerrigan as Caviar Jinks (uncredited)

Victor Kilian Jr. as U.S. Navy Petty Officer (uncredited)

George Kirby as Pilot Johnson (uncredited)

Kurt Kreuger as German U-Boat Sailor on Microphone (uncredited)

Glenn Langan as Gun Crewman (uncredited)

Rolf Lindau as Submarine Radio Operator (uncredited)

Manuel López as Mexican Seaman (uncredited)

Anthony Marsh as English Gun Captain (uncredited)

Frank Mayo as Major / Seaman (uncredited)

Clyde McAtee as Lieutenant-Commander at Meeting (uncredited)

Charles McMurphy as Lieutenant-Commander at Meeting (uncredited)

Edwin Mills as Naval Radio Operator (uncredited)

Frank Mills as Seaman (uncredited)

Howard M. Mitchell as Undetermined Secondary Role (uncredited)

Dennis Moore as Signalman (uncredited)

Jack Mower as Dispatcher (uncredited)

Rudolf Myzet as Russian Seaman (uncredited)

George N. Neise as German Lieutenant (uncredited)

Kurt Neumann as German (uncredited)

William H. O'Brien as Lieutenant-Commander at Meeting (uncredited)

Bob O'Connor as Lieutenant-Commander at Meeting (uncredited)

Gene O'Donnell as Lieutenant-Commander (uncredited)

George O'Hanlon as Navy Pilot (uncredited)

George Offerman, Jr. as Cecil (uncredited)

Paul Panzer as Seaman (uncredited)

Lee Phelps as Lieutenant-Commander (uncredited)

Joe Ploski as German Sailor (uncredited)

Russ Powell as Slops Denton (uncredited)

Hugh Prosser as Lieutenant Commander (uncredited)

Frank Puglia as Capt. Carpolis (uncredited)

Pedro Regas as Greek Seaman (uncredited)

Otto Reichow as German Petty Officer (uncredited)

Grandon Rhodes as Lieutenant Commander (uncredited)

Vera Richkova as Murmansk Welcomer (uncredited)

Kane Richmond as Ensign Wright (uncredited)

Walter Rode as Russian Air Force Captain (uncredited)

Cliff Saum as Seaman (uncredited)

Syd Saylor as Jim (uncredited)

Ferdinand Schumann-Heink as German (uncredited)

Hans Schumm as Lieutenant Commander (uncredited)

Harry Seymour as Pianist (uncredited)

George Sherwood as German (uncredited)

Walter Soderling as Pop (uncredited)

George Sorel as German Bombardier (uncredited)

Glenn Strange as Jake (uncredited)

Ludwig Stössel as Capt. Ziemer (uncredited)

Leo Sulky as Unemployed Seaman (uncredited)

Charles Sullivan as Seaman (uncredited)

Elliott Sullivan as Hennessy (uncredited)

Walter Thiele as German (uncredited)

Sigfrid Tor as Helmsman (uncredited)

Charles Trowbridge as Rear Adm. Hartridge (uncredited)

Peter van Eyck as German Ensign (uncredited)

Roland Varno as Gunnery Captain (uncredited)

Wilhelm von Brincken as German Submarine Captain (uncredited)

Hans von Morhart as German (uncredited)

Minor Watson as Rear Adm. Williams (uncredited)

Dick Wessel as Cherub Joe (uncredited)

John Whitney as U.S. Sailor (uncredited)

Dave Willock as Convoy Speaker (uncredited)

Tom Wilson as Bar Patron (uncredited)

Eric Wilton as Lieutenant-Commander at Meeting (uncredited)

Al Winters as German Lieutenant (uncredited)

Jack Wise as Dispatcher (uncredited)

Richard Woodruff as Squadron Leader (uncredited)

Jack Young as President Franklin D. Roosevelt (voice) (uncredited)

Charles Flynn as German (uncredited)