Holmes and Watson match wits with an opera star intent on blackmailing a king.
Eille Norwood
Sherlock Holmes
Hubert Willis
Dr. John Watson
Joan Beverley
Irene Adler
Mme. d'Esterre
Mrs. Hudson
Alfred Drayton
King Wilhelm von Ormstein
Annie Esmond
Maid
Maurice Elvey
Director
William J. Elliott
Writer
