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Clive Brook as Sherlock Holmes |
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H. Reeves-Smith as Dr. Watson |
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Betty Lawford as Mary Watson |
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Charles Hay as Captain Longmore |
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Phillips Holmes as Roger Longmore |
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Donald Crisp as Colonel Moran |
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Harry T. Morey as Professor Moriarty |
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Hubert Druce as Sergeant Gripper |
| Production | Basil Dean | Producer |
| Camera | William O. Steiner | Director of Photography |
| Writing | Basil Dean | Writer |
| Editing | Helene Turner | Editor |
| Writing | Garrett Fort | Writer |
| Directing | Basil Dean | Director |
| Writing | Arthur Conan Doyle | Story |
