Instead of the more familiar Victorian/Edwardian setting, this Sherlock Holmes takes place during the Second World War. Holmes is helping the Allies in their fight against the Nazis by obtaining a vital piece of equipment, while also protecting the scientist who created it from attacks and kidnap attempts.

"Sherlock Holmes and the Secret Weapon" (1942) Starring Basil Rathbone, Nigel Bruce, Lionel Atwill Screenplay by Edmund L. Hartmann, W. Scott Darling & Edward T. Lowe Jr. Written by W. Scott Darling & Edward T. Lowe Jr. Based on the short story "The Adventure of the Dancing Men" by Sir Arthur Conan Doyle Produced by Howard Benedict Directed by Roy William Neill

This film is in the public domain.