Holmes, retired to Sussex, is drawn into a last case when his arch enemy Moriarty arranges with an American gang to kill one John Douglas, a country gentleman with a mysterious past. Holmes' methods baffle Watson and Lestrade, but his results astonish them. In a long flashback, the victim's wife tells the story of the sinister Vermissa Valley.
You can now watch The Triumph of Sherlock Holmes online on the following streaming providers in the United States.
| Directing | Leslie S. Hiscott | Director |
| Writing | H. Fowler Mear | Adaptation |
| Writing | Arthur Conan Doyle | Novel |
| Production | Julius Hagen | Producer |
| Crew | William Luff | Cinematography |
| Editing | Ralph Kemplen | Editor |
| Art | James A. Carter | Art Direction |
| Directing | James Davidson | Assistant Director |
| Sound | W.L. Trytel | Music Director |
| Sound | Baynham Honri | Sound Recordist |
| Sound | Leo Wilkins | Sound Recordist |
