After the King of Ruthenia has been assassinated, Holmes and Watson are engaged to escort his son to Europe via Algiers, aboard a transatlantic ocean liner which also carries a number of suspicious persons, any of whom may be involved in a plot to also assassinate him.
Roy William Neill | Director |
Leonard Lee | Screenplay |
Arthur Conan Doyle | Characters |
Saul A. Goodkind | Editor |
Paul Ivano | Director of Photography |
John B. Goodman | Art Direction |
Martin Obzina | Art Direction |
Bernard B. Brown | Sound Director |
Russell A. Gausman | Set Decoration |
Ralph Sylos | Set Decoration |