The Marriage Circle (1924)

Professor Stock and his wife Mizzi are uhappily married The professor suspicious of his wife hires a detective to spy on her in hopes of obtaining a divorce Mizzi sets her sights on seducing Dr Franz Braun the new husband of her good friend Charlotte Dr Brauns colleague Dr Mueller who has his eye on Charlotte sees this as his opportunity Through a misunderstanding Charlotte thinks that her husband is interested in Miss Hofer and asks Mizzi to keep him occupied around and around the circle goes in Lubitschs refined comedy of mistaken infidelity