Director/a
Roy William Neill
DIRECTOR/A
Reparto (por orden de créditos)
Basil Rathbone
Sherlock Holmes
Nigel Bruce
Dr. Watson
Hillary Brooke
Lydia Marlow
Henry Daniell
Prof. Moriarty
Paul Cavanagh
Sir. George Fenwick
Matthew Boulton
Inspector Gregson
Eve Amber
Maude Fenwick
Frederick Worlock
Onslow
Coulter Irwin
Williams
Sally Shepherd
Crandon
Mary Gordon
Mrs. Hudson
Fred Aldrich
Detective(uncredited)
Eve Ashley
Background woman(uncredited)
John Burton
Waring - Mesmerist(uncredited)
Harold De Becker
Shoelace Seller(uncredited)
Leslie Denison
Vincent - Barman at Pembroke House(uncredited)
Tony Ellis
Carter - Hypnotized Subject(uncredited)
Tom Ferrandini
Club Patron(uncredited)
Kay Harding
4th Victim(uncredited)
Alec Harford
Commissioner of the CID(uncredited)
Ivo Henderson
Constable(uncredited)
Tommy Hughes
Newboy(uncredited)
Colin Hunter
Olaf Hytten
Norris - Fenwick's Butler(uncredited)
Boyd Irwin
Short-Tempered Officer Closing Window(uncredited)
Kermit Maynard
Eric Mayne
Member of Mesmer Club(uncredited)
Hans Moebus
William H. O'Brien
Pembrook House Waiter(uncredited)
Paul Power
Violet Seton
Nurse Mowbray - at Mesmer House(uncredited)
Count Stefenelli
Arthur Stenning
Mesmer Club Porter(uncredited)
Percival Vivian
Dr. Simnell(uncredited)