Der rote Kreis (English: The Crimson Circle) is a 1929 British-German crime film directed by Frederic Zelnik and starring Lya Mara, Fred Louis Lerch, and Stewart Rome.
The film, a co-production between British International Pictures and Efzet Film, was made in both a silent version and a sound version filmed in the Phonofilm sound-on-film system. In March 1929, this film and The Clue of the New Pin, filmed in the British Phototone sound-on-disc process, were previewed in London.
The film is an adaptation of the Edgar Wallace novel The Crimson Circle in which Scotland Yard detectives battle a gang of blackmailers. A previous UK version was filmed in 1922.
Police battle against a gang of blackmailers known as The Crimson Circle.