Having once again avoided criminal conviction, Professor Moriarity develops a murderous plan to “finish off” his last major nemesis, Sherlock Holmes, by making him fail to prevent the perfect crime. Does it involve a family curse, the crown jewels of England, or something else…
| Directing | Alfred L. Werker | Director |
| Writing | William Gillette | Theatre Play |
| Writing | Edwin Blum | Screenplay |
| Writing | William Absalom Drake | Screenplay |
| Production | Darryl F. Zanuck | Producer |
| Art | Richard Day | Art Direction |
| Art | Thomas Little | Set Decoration |
| Costume & Make-Up | Gwen Wakeling | Costume Design |
| Production | Gene Markey | Associate Producer |
| Camera | Leon Shamroy | Director of Photography |
| Art | Hans Peters | Art Direction |
| Editing | Robert Bischoff | Editor |
| Writing | Arthur Conan Doyle | Characters |
