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