A young woman turns to Holmes for protection when she's menaced by an escaped killer seeking missing treasure. However, when the woman is kidnapped, Holmes and Watson must penetrate the city's criminal underworld to find her.
| Sound | Ernest Irving | Music |
| Directing | Graham Cutts | Director |
| Camera | Robert Martin | Director of Photography |
| Production | Basil Dean | Producer |
| Art | Clifford Pember | Art Direction |
| Camera | Robert De Grasse | Director of Photography |
| Editing | Otto Ludwig | Editor |
| Production | Rowland V. Lee | Production Supervisor |
| Writing | Arthur Conan Doyle | Novel |
| Writing | W.P. Lipscomb | Screenplay |
