Cmdr. Robert 'Bob' Kingsley
Anna Marie Von Steuben
Fraulein Lolita
Chief Mike 'Guns' Costello
'Lug' Kaufman
Ens. Richard 'Dick' Cabot (as Gaylord Pendleton)
Chief Joe Cobb
Lt. 'Mac' McGregor
Baron Ernst von Steuben (U-boat commander)
Franz Shiller
