The Secret of the Black Widow (German: Das Geheimnis der schwarzen Witwe) is a 1963 West German crime film directed by Franz Josef Gottlieb and starring O. W. Fischer, Karin Dor and Klaus Kinski. It is part of a boom of Krimi films produced during the decade, the third of four films based on the work of Louis Weinert-Wilton that came in the wake of Rialto Film's successful Edgar Wallace adaptations. It was shot in Spain. The film's sets were designed by the art director Ramiro Gómez.
Cast
O. W. Fischer as Wellby
Karin Dor as Clarisse
Klaus Kinski as Boyd
Werner Peters as Mr. Shor
Doris Kirchner as Mrs. Shor
Eddi Arent as Fish
Claude Farell as Mrs. Ayke
Gabriel Llopart as Selwood
José María Caffarel as Cartwright
Antonio Casas as Bronsfield
Félix Dafauce as Inspector Terry
Cris Huerta as Slim
Tomás Blanco
Ángel Menéndez
George Rigaud