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