as Sherlock Holmes
as Dr. John H. Watson
as Adrea Spedding
as Insp. Lestrade
as Norman Locke
as Radlik
as Adam Gilflower
as Mrs. Hudson
as Larry (uncredited)
as Artie - Shooting Gallery Attendant (uncredited)
as Fred Garvin (uncredited)
as Fortune Teller (uncredited)
as Obongo - Pygmy (uncredited)
as Charwoman (uncredited)
as Charwoman (uncredited)
as News Vendor (uncredited)
as Carnival Patron (uncredited)
as Toy Doll Attendant (uncredited)
as Susan (uncredited)
as Radio Announcer (uncredited)
as Casino Patron (uncredited)
as Casino Patron (uncredited)
as News Vendor (uncredited)
as Robert (uncredited)
as Casino Patron (uncredited)
as Casino Patron (uncredited)
as Doorman (uncredited)
as Casino Croupier (uncredited)
as Henchman Taylor (uncredited)
as Plainclothesman (uncredited)
as Casino Patron (uncredited)
as Casino Patron (uncredited)
as Casino Patron (uncredited)