- Addison Richards - Admiral Ross
- Hans Joby - U-Boat Petty Officer
- Henry Hunter - Ensign Dyer
- Jonathan Hale - Admiral Girard
- Leon Ames - Recruiting Officer (uncredited)
- Arthur Belasco - Fisherman (uncredited)
- Joseph E. Bernard - Fisherman (uncredited)
- Wade Boteler - Recruiting Officer (uncredited)
- Al Bridge - Fisherman (uncredited)
- Rand Brooks - Listener (uncredited)
- Don Castle - Radio Operator (uncredited)
- Jack Chapin - Sailor (uncredited)
- Tom Chatterton - Lieutenant (uncredited)
- Jack Rube Clifford - Captain (uncredited)
- Jules Cowles - Man with Finch (uncredited)
- Joe De Stefani - Fisherman (uncredited)
- Edgar Dearing - Petty Officer (uncredited)
- Richard Elmore - Lookout (uncredited)
- Frank Faylen - Recruiting Officer (uncredited)
- Budd Fine - Survivor (uncredited)
- Allen Fox - Lookout (uncredited)
- Frederick Lee - Sailor (uncredited)
- Eddie Hart - Fisherman (uncredited)
- Edward Hearn - Fisherman (uncredited)
- Howard Hickman - Surgeon (uncredited)
- Earle Hodgins - Fisherman (uncredited)
- Payne B. Johnson - Boy (uncredited)
- Charles Jordan - Signalman (uncredited)
- Lew Kelly - Sailor (uncredited)
- Jack Kennedy - Fisherman (uncredited)
- Milton Kibbee - Fisherman (uncredited)
- Claire McDowell - Nurse (uncredited)
- Larry McGrath - Radio Operator (uncredited)
- Roger Moore - Orderly (uncredited)
- Forbes Murray - Naval Aide (uncredited)
- Frank Orth - Old Sailor in Bilge Area (uncredited)
- Syd Saylor - Wireless Operator Sending Coded Message (uncredited)
- Ferdinand Schumann-Heink - German Operator (uncredited)
- Hans Schumm - German Sailor Looking for Wireless (uncredited)
- Harry Semels - Cook on Tugboat (uncredited)
- Lee Shumway - Sailor (uncredited)
- Robert R. Stephenson - German Sailor (uncredited)
- Harry Strang - Shore Patrol Sailor (uncredited)
- Emmett Vogan - Junior Officer Standing by Map (uncredited)
- Hans von Morhart - German Sailor (uncredited)
- Doodles Weaver - Sailor (uncredited)
- George B. Seitz
-
Harvey S. Haislip, Wells Root
-
J. Walter Ruben
- David Snell
- Douglas Shearer
Wallace Beery interpreta a John Thorson en la película.
Chester Morris interpreta a 'Rocky' Blake en la película.
Virginia Grey hace el papel de Susan Thorson.
Douglass Dumbrille interpreta a District Commander en la película.
Carl Esmond interpreta a U-Boat Captain en la película.
Clem Bevans interpreta a 'Cap' Finch en la película.
John Qualen interpreta a Milo en la película.
Regis Toomey hace el papel de Ives.
Henry Victor interpreta a German U-Boat Officer en la película.
Addison Richards interpreta a Admiral Ross en la película.
Hans Joby hace el papel de U-Boat Petty Officer.
Henry Hunter interpreta a Ensign Dyer en la película.
Jonathan Hale hace el papel de Admiral Girard.
Leon Ames interpreta a Recruiting Officer (uncredited) en la película.
Arthur Belasco interpreta a Fisherman (uncredited) en la película.
Joseph E. Bernard interpreta a Fisherman (uncredited) en la película.
Wade Boteler hace el papel de Recruiting Officer (uncredited).
Al Bridge interpreta a Fisherman (uncredited) en la película.
Rand Brooks hace el papel de Listener (uncredited).
Don Castle interpreta a Radio Operator (uncredited) en la película.
Jack Chapin interpreta a Sailor (uncredited) en la película.
Tom Chatterton interpreta a Lieutenant (uncredited) en la película.
Jack Rube Clifford hace el papel de Captain (uncredited).
Jules Cowles interpreta a Man with Finch (uncredited) en la película.
Leigh De Lacey interpreta a Mrs. Gill (uncredited) en la película.
Joe De Stefani interpreta a Fisherman (uncredited) en la película.
Edgar Dearing interpreta a Petty Officer (uncredited) en la película.
Richard Elmore interpreta a Lookout (uncredited) en la película.
Frank Faylen hace el papel de Recruiting Officer (uncredited).
Budd Fine hace el papel de Survivor (uncredited).
Allen Fox hace el papel de Lookout (uncredited).
Frederick Lee hace el papel de Sailor (uncredited).
Eddie Hart interpreta a Fisherman (uncredited) en la película.
Edward Hearn interpreta a Fisherman (uncredited) en la película.
Howard Hickman interpreta a Surgeon (uncredited) en la película.
Earle Hodgins interpreta a Fisherman (uncredited) en la película.
Clarke Jennings interpreta a Wireless Operator (uncredited) en la película.
Payne B. Johnson hace el papel de Boy (uncredited).
Charles Jordan hace el papel de Signalman (uncredited).
Lew Kelly interpreta a Sailor (uncredited) en la película.
Jack Kennedy interpreta a Fisherman (uncredited) en la película.
Milton Kibbee interpreta a Fisherman (uncredited) en la película.
Claire McDowell interpreta a Nurse (uncredited) en la película.
Larry McGrath interpreta a Radio Operator (uncredited) en la película.
Roger Moore interpreta a Orderly (uncredited) en la película.
Philip Morris interpreta a Fisherman (uncredited) en la película.
Forbes Murray hace el papel de Naval Aide (uncredited).
Frank Orth interpreta a Old Sailor in Bilge Area (uncredited) en la película.
Syd Saylor hace el papel de Wireless Operator Sending Coded Message (uncredited).
Harold Schlickenmayer interpreta a Engineer (uncredited) en la película.
Ferdinand Schumann-Heink interpreta a German Operator (uncredited) en la película.
Hans Schumm hace el papel de German Sailor Looking for Wireless (uncredited).
Harry Semels hace el papel de Cook on Tugboat (uncredited).
Lee Shumway hace el papel de Sailor (uncredited).
Robert R. Stephenson interpreta a German Sailor (uncredited) en la película.
Harry Strang interpreta a Shore Patrol Sailor (uncredited) en la película.
Walter Thiele interpreta a Young German Sailor (uncredited) en la película.
Emmett Vogan interpreta a Junior Officer Standing by Map (uncredited) en la película.
Hans von Morhart hace el papel de German Sailor (uncredited).
Doodles Weaver hace el papel de Sailor (uncredited).
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