Sherlock Holmes and the Secret Weapon the two other than the code. It is implied that the events of "The Dancing Men" are canon with the events of the film, as Watson is reminded of "a case [they] had some years ago". Lionel Atwill appeared previously in the film "The Hound of the Baskervilles" (1939) as Dr Mortimer. Sherlock Holmes and the Secret Weapon Sherlock Holmes and the Secret Weapon (1942) is the fourth in the Basil Rathbone/Nigel Bruce series of 14 Sherlock Holmes films which updated the characters created by Sir Arthur Conan Doyle to the then present day. The film is credited as an
Sherlock Holmes and the Secret Weapon of a Swiss scientist by their nemesis Professor Moriarty, to steal a new bomb sight and sell it to Nazi Germany. Sherlock Holmes and Dr. John Watson have to crack a secret code in order to save the country. The film is one of four films in the series which are in the public domain. Sherlock Holmes (Basil Rathbone) pretends to be a Nazi spy to aid scientist Dr. Franz Tobel (William Post Jr.) and his new invention, a bombsight, in escaping a Gestapo trap in Switzerland. Holmes and Franz fly to London, where Holmes places him under the protection