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