The second of the three film versions of the E. Phillips Oppenheim espionage thriller set largely in an old dark house where a tremulous wife wonders if her husband is really his double, a dastardly German spy.
Movie tag line: "The Supreme SPY Adventure!"
Production companies:
Character: Sir Everard Dominey / Baron Leopold von Ragostein
Character: Eleanor Dominey
Character: Princess Stephanie Elderstrom
Character: Seaman
Character: Eddie Pelham
Character: Mrs. Unthank
Character: Middleton
Character: Dr. Harrison
Character: Duchess Caroline
Character: Duke Henry
Character: Sir Ivan Brunn
Character: Mangan
Character: Sir Gerald Hume
Character: Dr. Trenk
Character: Perkins
Character: Middleton's Daughter (uncredited)
Character: Duval (uncredited)
Character: Maid (uncredited)
Character: Lady Hume (uncredited)
Character: Bartender (uncredited)
Character: Villager (uncredited)
Character: Villager (uncredited)
Character: Villager (uncredited)
Character: Waiter (uncredited)
Character: Roger Unthank (uncredited)
Character: English Farmer (uncredited)
Character: English Farmer (uncredited)
Character: Wolff (uncredited)
Character: Hugo (uncredited)
Character: German (uncredited)
Character: Army Officer (uncredited)
Character: Lord Allison (uncredited)
Character: Chauffeur (uncredited)