The House of Dora Green

The House of Dora Green (Salon Dora Green) is a 1933 German thriller film directed by Henrik Galeen and starring Mady Christians, Paul Hartmann, and Leonard Steckel. It was based on the novel Diplomatische Unterwelt by Hans Rudolf Berndorff. It was the final German film made by Galeen, before being forced into exile following the Nazi Party's takeover of power. In 1937 it was released in the United States.

Synopsis
Foreign spies wishing to steal a technological breakthrough enlist the unwitting assistance of a cabaret singer, Dora Green. After she discovers their true intentions, she helps the authorities thwart their scheme.