Obsazení
Walter C. Kelly
Chief Mike 'Guns' Costello
George O'Brien
Cmdr. Robert 'Bob' Kingsley
Mona Maris
Fraulein Lolita
Warren Hymer
'Lug' Kaufman
Henry Victor
Baron Ernst von Steuben (U-boat commander)
John Loder
Franz Shiller
William Collier Sr.
Mugs O'Flaherty (uncredited)
Francis Ford
Eric - Captain of Trawler (uncredited)
Jack Murphy
Naval Reservist (uncredited)
Walter McGrail
Chief Joe Cobb
Larry Kent
Lt. 'Mac' McGregor
Joseph Depew
Naval Reservist (uncredited)
Maurice Murphy
Merkel (uncredited)
Nat Pendleton
'Butch' Wagner (uncredited)
Steve Pendleton
Ens. Richard 'Dick' Cabot (as Gaylord Pendleton)
Edward Peil Jr.
Naval Reservist (uncredited)
Ferdinand Schumann-Heink
Adolph Brucker (uncredited)
Harry Strang
Gunner and drill sergeant (uncredited)
Harry Tenbrook
Winkler (uncredited)
Marion Lessing
Anna Marie Von Steuben
Hans Fuerberg
Fritz Kampf (Second Officer of U-172) (uncredited)
George Harris
Naval Reservist/Swimmer and Diver (uncredited)