Sherlock Holmes and the Secret Weapon is a 1942 film by director Roy William Neill, as well as a very, very loose adaptation of Sir Arthur Conan Doyle's 1903 novel The Adventure of the Dancing Men. It's the fourth movie in a series of Sherlock Holmes films starring iconic duo Basil Rathbone and Nigel Bruce, and the second picture to be set during the Second World War.

The story is that Holmes must keep a key scientist — whose device could alter the course of the fight against fascism — out of the clutches of the Nazis and other sinister forces. Holmes is "aided" in his quest by Bruce's bumbling Dr. Watson, the slightly-less bumbling denizens of Scotland Yard, and a wardrobe full of embarrassing-and-occasionally-racist disguises. 

Does this flawed Holmes picture prove to be a "secret weapon" of sorts, or is it a complete misfire? Listen to this episode to decode the mystery! 

And beware! This review contains spoilers!

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