- TODAY'S U-BOAT TERROR MAKES THIS THE YEAR'S TIMELIEST PICTURE!
- Enemy U-Boat commander sails under orders of death! Lovers trapped in the cruel inferno of war!
- Women and children first...to die...in U-Boat attack! Suicide submarine crews ravage the high seas...in history's most ruthless slaughter of innocents!
- Is this beauty friend or foe...as U-Boat terror at sea is directed by unknown master spies on land? Out of Europe's blackout of peace flashes the inside story of ruthless submarine warfare and incredible world-wide espionage!
- Inside Story of Submarine Warfare!
- Alexander Korda's MIGHTY SPY SPECTACLE!
- The Most Timely and Authentic Drama of Submarine Warfare and International Espionage Ever Made!
- Filmed While Headlines and Radio Tell Only Half the Story!
- Thrill successor to "Clouds Over Europe"
- See: Cold-Blooded Murder! Warm Lips Kill! Island of Mystery! Pirates of the Sea!
- THE OTHER HALF OF THE STORY THAT RADIOS AND HEADLINES CANNOT TELL! (Print Ad- Victoria Daily Times, ((Victoria, BC)) 14 December 1939)
- INSIDE STORY OF SUBMARINE ATROCITIES! (Print Ad- Reading Eagle, ((Reading, Penna.)) 2 May 1940)
- THE WHOLE SHOCKING TRUTH OF SUBMARINE WARFARE the inside story of U-Boat atrocities with all its stark terror! STARTLING FACTS REVEALED! (Print Ad-Philadelphia Inquirer, ((Philadelphia, Penna.)) 3 November 1939)
- Out of Europe's Blackout of Peace ... Flames the Inside Story of Submarine Warfare and International Espionage
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