British Intelligence is a 1940 spy film set in World War I. It was directed by Terry O. Morse and stars Boris Karloff and Margaret Lindsay. Boris Karloff took a break from playing monsters and mad scientists to appear in this spellbinding wartime drama from Warner Bros. Pretty German master spy Helene von Lorbeer (Margaret Lindsay) goes undercover to live with the family of a high-placed British official where she is to rendezvous with Valdar the butler (Karloff), who is also a spy. Together, they are to transmit secret war plans back to Germany. The film, also known as Enemy Agent, was released in the United States in January 1940. The Warner Bros. film was based on a 1918 play Three Faces East written by Anthony Paul Kelly and produced on the stage by George M. Cohan. Two film adaptations of Three Faces East in 1926 and 1930 preceded British Intelligence.