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.
Sir Everard Dominey / Baron Leopold von Ragostein
Eleanor Dominey
Princess Stephanie Elderstrom
Seaman
Eddie Pelham
Mrs. Unthank
Middleton
Dr. Harrison
Duchess Caroline
Duke Henry
Sir Ivan Brunn
Mangan
Sir Gerald Hume
Dr. Trenk
Perkins
Middleton's Daughter (uncredited)
Duval (uncredited)
Maid (uncredited)
Lady Hume (uncredited)
Bartender (uncredited)
Villager (uncredited)
Waiter (uncredited)
Roger Unthank (uncredited)
English Farmer (uncredited)
Wolff (uncredited)
Hugo (uncredited)
German (uncredited)
Army Officer (uncredited)
Lord Allison (uncredited)
Chauffeur (uncredited)
Director
Novel
Director of Photography
Screenplay
Executive Producer
Music
Assistant Camera
Sound Recordist
Production Secretary
