Casts
Arthur Wontner
as Sherlock Holmes
Ian Fleming
as Dr. John Watson
Minnie Rayner
as Mrs. Hudson
Leslie Perrins
as Ronald Adair
Jane Welsh
as Kathleen Adair
Norman McKinnel
as Prof. Robert Moriarty / Col. Henslowe
Harry Terry
as No. 16
Charles Paton
as J.J. Godfrey
