Cast
Basil Rathbone
Sherlock Holmes
Nigel Bruce
Dr. John Watson
Hillary Brooke
Lydia Marlowe
Henry Daniell
Professor James Moriarty
Paul Cavanagh
Sir George Fenwick
Matthew Boulton
Inspector Gregson
Eve Amber
Maude Fenwick
Frederick Worlock
Dr. Onslow
Percival Vivian
Dr. Simnell
Coulter Irwin
Corporal Williams
Sally Shepherd
Crandon
Mary Gordon
Mrs. Hudson
John Burton
Waring the Mesmerist (uncredited)
Harold De Becker
Shoelace Vendor Henchman (uncredited)
Tony Ellis
Carter the Hypnotized Subject (uncredited)
Bess Flowers
Bar Patron (seen in mirror) (uncredited)
Kay Harding
4th Victim (uncredited)
Alec Harford
Commissioner of the CID (uncredited)
Olaf Hytten
Fenwick's Butler Norris (uncredited)
Boyd Irwin
Short-Tempered Officer Closing Window (uncredited)
Eric Mayne
Member of Mesmer Club (uncredited)
William H. O'Brien
Pembrook House Waiter (uncredited)
Crew
Edward Curtiss
Editor
(Editing)
John B. Goodman
Art Direction
(Art)
Virgil Miller
Director of Photography
(Camera)
Roy William Neill
Producer
(Production)
John P. Fulton
Special Effects
(Crew)
Vera West
Costume Design
(Costume & Make-Up)
Roy William Neill
Director
(Directing)
Russell A. Gausman
Set Decoration
(Art)
Melville Shyer
Assistant Director
(Directing)
Bertram Millhauser
Screenplay
(Writing)
Mark Levant
Music Director
(Sound)
Ted von Hemert
Set Decoration
(Art)
Martin Obzina
Art Direction
(Art)
Bernard B. Brown
Sound Director
(Sound)
Roswell A. Hoffmann
Camera Operator
(Camera)
Arthur Conan Doyle
Novel
(Writing)