Sherlock Holmes And The Secret Weapon (1943)

"Sherlock Holmes and the Secret Weapon" is a 1943 mystery film directed by Roy William Neill and starring Basil Rathbone as Sherlock Holmes and Nigel Bruce as Dr. Watson.

Holmes and Watson must protect a Swiss scientist and his invention, a bomb sight that could turn the tide of World War II. Holmes battles against his arch-nemesis, Professor Moriarty, who wants to steal the invention.
Basil Rathbone portrays the brilliant detective Sherlock Holmes, while Nigel Bruce plays his loyal friend, Dr. Watson. Lionel Atwill stars as the villainous Professor Moriarty.

The film combines wartime espionage with classic detective work, focusing on themes of loyalty, ingenuity, and the battle between good and evil.

The movie was well-received for its suspenseful plot and Rathbone's iconic portrayal of Holmes.