Basil Rathbone
Role: Sherlock Holmes
Nigel Bruce
Role: Dr. John H. Watson
Gale Sondergaard
Role: Adrea Spedding
Dennis Hoey
Role: Insp. Lestrade
Vernon Downing
Role: Norman Locke
Arthur Hohl
Role: Adam Gilflower
Mary Gordon
Role: Mrs. Hudson
Teddy Infuhr
Role: Larry (uncredited)
Donald Stuart
Role: Artie - Shooting Gallery Attendant (uncredited)
Harry Cording
Role: Fred Garvin (uncredited)
Belle Mitchell
Role: Fortune Teller (uncredited)
Angelo Rossitto
Role: Obongo - Pygmy (uncredited)
Sylvia Andrew
Role: Charwoman (uncredited)
Marie De Becker
Role: Charwoman (uncredited)
Jimmy Aubrey
Role: News Vendor (uncredited)
Brandon Beach
Role: Carnival Patron (uncredited)
Frank Benson
Role: Toy Doll Attendant (uncredited)
Lydia Bilbrook
Role: Susan (uncredited)
John Burton
Role: Radio Announcer (uncredited)
James Carlisle
Role: Casino Patron (uncredited)
Jack Deery
Role: Casino Patron (uncredited)
George Kirby
Role: News Vendor (uncredited)
Stanley Logan
Role: Robert (uncredited)
Wilbur Mack
Role: Casino Patron (uncredited)
Edmund Mortimer
Role: Casino Patron (uncredited)
William H. O'Brien
Role: Doorman (uncredited)
John Roche
Role: Casino Croupier (uncredited)
Gene Roth
Role: Henchman Taylor (uncredited)
Arthur Stenning
Role: Plainclothesman (uncredited)
Florence Wix
Role: Casino Patron (uncredited)
Herschel Graham
Role: Casino Patron (uncredited)
Ethelreda Leopold
Role: Casino Patron (uncredited)