In this 1943 film, Sherlock Holmes squares off against his diabolical nemesis Professor Moriarty (Lionel Atwill), who has kidnapped the inventor of a new technologically advanced bomb site and is threatening to sell the invention to the Nazis. England's fate hangs in the balance as Holmes and Watson must break a secret code of dancing men to stop the Nazis and rescue the inventor. Dennis Hoey makes his debut as Inspector Lestrade of Scotland Yard.
Between 1939 and 1945, Universal Pictures filmed 14 Sherlock Holmes mysteries starring Basil Rathbone as Sir Arthur Conan Doyle's legendary detective and Nigel Bruce as his faithful sidekick Dr. Watson. All but two of the films were "updated" to World War II England and often included Axis spies or saboteurs as antagonists. Each movie has been preserved and digitally restored by the UCLA Film and Television Archive in a 35 mm format that retains the visual flair of the original film's ominous shadows and intriguing camera angles.