Eille Norwood
— Sherlock Holmes
Hubert Willis
— Dr. John Watson
Tom Ronald
— Reuben Hayes
Charles Croker-King
— Duke of Holdernesse
Irene Rooke
— Duchess of Holdernesse
Mme. d'Esterre
— Mrs. Hudson
Leslie English
— Dr. Thorneycroft Huxtable
Patrick Key
— Lord Arthur Saltire
Cecil Kerr
— James Wilder