Sherlock Holmes investigates when young women around London turn up murdered, each with a finger severed. Scotland Yard suspects a madman, but Holmes believes the killings to be part of a diabolical plot.
| Crew | John P. Fulton | Special Effects |
| Directing | Roy William Neill | Director |
| Production | Roy William Neill | Producer |
| Editing | Edward Curtiss | Editor |
| Art | John B. Goodman | Art Direction |
| Camera | Virgil Miller | Director of Photography |
| Art | Russell A. Gausman | Set Decoration |
| Costume & Make-Up | Vera West | Costume Design |
| Art | Ted von Hemert | Set Decoration |
| Sound | Bernard B. Brown | Sound Director |
| Sound | Mark Levant | Music Director |
| Art | Martin Obzina | Art Direction |
| Writing | Bertram Millhauser | Screenplay |
| Camera | Roswell A. Hoffmann | Camera Operator |
| Writing | Arthur Conan Doyle | Novel |
| Directing | Melville Shyer | Assistant Director |
