Diretor/a
John Ford
DIRETOR/A
Elenco (na ordem dos créditos)
George O'Brien
Cmdr. Robert 'Bob' Kingsley
Marion Lessing
Anna Marie Von Steuben
Mona Maris
Fraulein Lolita
Walter C. Kelly
Chief Mike 'Guns' Costello
Warren Hymer
'Lug' Kaufman
Steve Pendleton
Ens. Richard 'Dick' Cabot
Walter McGrail
Chief Joe Cobb
Larry Kent
Lt. 'Mac' McGregor
Henry Victor
Baron Ernst von Steuben (U-boat commander)
John Loder
Franz Shiller
Philip Ahlm
German Chief Petty Officer(uncredited)
Al Bennett
Naval Reservist(uncredited)
Earl Wayland Bowman
Bill Brande
William Collier Sr.
Mugs O'Flaherty(uncredited)
Leonard Davison
Joseph Depew
Francis Ford
Eric - Captain of Trawler(uncredited)
Robert Ford
Hans Fuerberg
Fritz Kampf (Second Officer of U-172)(uncredited)
Curt Furberg
Hoffman(uncredited)
Al Generaux
Bob Gillette
George Golden
Ben Hall
Elmer Harrigan(uncredited)
George Harris
Bob Kyle
Jack Martin
Harry Mount
Bugler on Gun Crew(uncredited)
Jack Murphy
Maurice Murphy
Merkel(uncredited)
Bob Nelson
Edward Peil Jr.
Nat Pendleton
'Butch' Wagner(uncredited)
Terrance Ray
'Skits' Reilly(uncredited)
Marvin Schecter
Gunner(uncredited)
Harry Schultz
German Officer(uncredited)
Ferdinand Schumann-Heink
Adolph Brucker(uncredited)
Robert Shepherd
Harry Strang
Gunner and drill sergeant(uncredited)
Anton Tell
George Templeton
Harry Tenbrook
Winkler(uncredited)
T.J.F. von Blankerburg
Frank Walton
Harry Weil
Levinsky(uncredited)
Hans Winterhalder