Double feature starring Basil Rathbone as detective Sherlock Holmes. In 'The Adventures of Sherlock Holmes' (1939), Professor Moriarity (George Zucco) has come up with a scheme for stealing the crown jewels from the Tower of London. To get Holmes involved, he persuades a flute player to murder a girl. In 'Sherlock Holmes and the Secret Weapon' (1943), Holmes travels to Switzerland to rescue the inventor of a bomb-sight which the allies want to keep from the Nazis. Back in London, however, it turns out that the inventor is not all that he seemed...