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