Elenco
Basil Rathbone
Sherlock Holmes
Nigel Bruce
Doctor Watson
Marjorie Riordan
Sheila Woodbury
Rosalind Ivan
Agatha Dunham
Morton Lowry
Steward
Leslie Vincent
Nikolas Watson
Martin Kosleck
Mirko
Rex Evans
Gregor
John Abbott
Jodri
Gerald Hamer
Kingston
William 'Wee Willie' Davis
Gubek
Frederick Worlock
Prime Minister
Tom Dillon
Matthias Cherney (uncredited)
James Carlisle
Aide (uncredited)
Olaf Hytten
Stimson (uncredited)
Gordon Jackson
Steward (uncredited)
Equipe
Saul A. Goodkind
Editor
Roy William Neill
Director
Leonard Lee
Screenplay
Arthur Conan Doyle
Characters
Paul Ivano
Director of Photography
Martin Obzina
Art Direction
Ralph Sylos
Set Decoration
John B. Goodman
Art Direction
Bernard B. Brown
Sound Director
Vera West
Costume Design
Jack Pierce
Makeup Department Head
Russell A. Gausman
Set Decoration
Howard Benedict
Executive Producer
Roy William Neill
Producer