Seas Beneath

In the waning days of WWI, a U.S. "Mystery Ship," sets sail for the coast of Spain towing a submarine. Their mission is to find and sink a U-boat that has been especially effective in attacking Allied shipping. Posing as a harmless schooner, the mystery ship is in fact fitted with a formidable gun capable of sinking a U-boat. Stopping in the Canary Islands to refuel, the crew interacts with locals involved with Germans, and with Germans themselves, including the sister of the U-Boat commander, who is lurking offshore waiting for the coming battle.

• John FordDirector
• Dudley NicholsWriter
• Peter BrunelliOriginal Music Composer

• George O'BrienCmdr. Robert 'Bob' Kingsley
• Marion LessingAnna Marie Von Steuben
• Mona MarisFraulein Lolita
• Walter C. KellyChief Mike 'Guns' Costello
• Warren Hymer'Lug' Kaufman
• Steve PendletonEns. Richard 'Dick' Cabot (as Gaylord Pendleton)
• Walter McGrailChief Joe Cobb
• Larry KentLt. 'Mac' McGregor
• Henry VictorBaron Ernst von Steuben (U-boat commander)
• John LoderFranz Shiller
• Philip AhlmGerman Chief Petty Officer (uncredited)
• Al BennettNaval Reservist (uncredited)