A card cheat is threatened with exposure into joining a criminal enterprise that Sherlock Holmes believes is controlled by Professor Moriarity.
Leslie S. Hiscott
Director
Arthur Wontner
Sherlock Holmes
Ian Fleming
Dr. John Watson
Minnie Rayner
Mrs. Hudson
Leslie Perrins
Ronald Adair
Jane Welsh
Kathleen Adair
Norman McKinnel
Prof. Robert Moriarty / Col. Henslowe
William Fazan
Thomas Fisher
Sydney King
Tony Rutherford
Philip Hewland
Inspector Lestrade
Gordon Begg
Marston, the butler
Louis Goodrich
Colonel Sebastian Moran
Harry Terry
No. 16
Charles Paton
J.J. Godfrey
