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Arthur Wontner as Sherlock Holmes |
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Jane Welsh as Lady Violet Lamsden |
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Miles Mander as Claude Holford |
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Francis L. Sullivan as Baron von Guntermann |
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Ian Fleming as Dr. John Watson |
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Dino Galvani as Carlo Ravelli |
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Philip Hewland as Insp. Lestrade |
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Minnie Rayner as Mrs. Hudson |
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Anthony Holles as Marquess de Chaminade |
| Editing | Jack Harris | Editor |
| Camera | Cyril Stanborough | Still Photographer |
| Camera | Basil Emmott | Director of Photography |
| Writing | Arthur Conan Doyle | Story |
| Production | Julius Hagen | Producer |
| Sound | Baynham Honri | Sound Recordist |
| Directing | Leslie S. Hiscott | Director |
| Writing | H. Fowler Mear | Writer |
| Writing | Cyril Twyford | Writer |
| Camera | Sydney Blythe | Director of Photography |
