Summary: During WWI pretty German master spy Helene von Lorbeer is sent undercover to London to live with the family of a high-placed British official where she is to rendezvous with the butler Valdar, also a spy, and help him transmit secret war plans back to Germany (imdb)

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Genres: Suspense/Thriller, War

Country: USA

Directed By: Terry O. Morse

Written By: Anthony Paul Kelly, Lee Katz

Starring: Boris Karloff, Margaret Lindsay, Bruce Lester, Leonard Mudie, Holmes Herbert, Austin Fairman

More information at the Internet Movie Database