Sherlock Holmes
Basil Rathbone
Dr. Watson
Nigel Bruce
Lloyd Brandon
Peter Willes
Mrs. Hudson
Mary Gordon
Justice of the Court
Holmes Herbert
Henchman Mateo
George Regas
Lady Conyngham
Mary Forbes
Dawes, Moriarty's servant
Frank Dawson
Inquisitive Stranger
William Austin
Tony Conyngham
Anthony Kemble-Cooper
Barrows - Moriarty's Attorney (uncredited)
Leonard Mudie
Foreman of the Jury (uncredited)
Robert Nobel
Ann Brandon
Ida Lupino
Gates - Trial Prosecutor (uncredited)
Ivan F. Simpson
Clerk of the Court (uncredited)
Neil Fitzgerald
Tompkins (uncredited)
Frank Baker
Denis Green (uncredited)
Denis Greene
Tower Sentry (uncredited)
Robert Cory
Guard (uncredited)
Gordon Hart
Constable (uncredited)
Keith Hitchcock
Bobby (uncredited)
Ivo Henderson
Leyland Hodgson
Boyd Irwin
Jerrold Hunter
Alan Marshal
Marine Sergeant (uncredited)
Charles Irwin
Cabby (uncredited)
Robert R. Stephenson
Second Fake Constable (uncredited)
Harry Cording
Conyngham Butler (uncredited)
Eric Wilton
Cockney (uncredited)
Frank Benson
Pub Customer (uncredited)
Ted Billings
Scotland Yard Man (uncredited)
Herbert Evans
Billy
Terry Kilburn
Professor Moriarty
George Zucco
Sir Ronald Ramsgate
Henry Stephenson
Inspector Bristol
E. E. Clive
Henchman Bassick
Arthur Hohl
Mrs. Jameson, Brandon Housekeeper
May Beatty
Director
Alfred L. Werker
Producer
Darryl F. Zanuck
Characters
Arthur Conan Doyle
Associate Producer
Gene Markey
Theatre Play
William Gillette
Screenplay
Edwin Blum
Director of Photography
Leon Shamroy
Editor
Robert Bischoff
Art Direction
Richard Day
Hans Peters
Set Decoration
Thomas Little
Costume Design
Gwen Wakeling
William Absalom Drake