Sherlock Holmes and the Secret Weapon (1942) is a thrilling wartime mystery that follows the legendary detective Sherlock Holmes, portrayed by Basil Rathbone, as he teams up with Dr. Watson (Nigel Bruce) to thwart a Nazi plot. Set during World War II, the story begins when Holmes helps Dr. Franz Tobel, a Swiss scientist, escape from Europe to London with a top-secret invention—a powerful bomb sight that could change the course of the war. However, Tobel soon goes missing, and Holmes suspects that enemy agents are trying to capture the device for the Nazis.

Holmes races against time to unravel the mystery, decode a cryptic message left by Tobel, and outwit his archenemy, the cunning Professor Moriarty, who is collaborating with the Nazis to steal the bomb sight. Filled with suspense, intrigue, and clever deductions, *Sherlock Holmes and the Secret Weapon* combines classic detective elements with wartime espionage, showcasing Holmes’s intellectual prowess as he battles both criminal masterminds and wartime threats.