Sherlock Holmes
Raymond Massey
Dr. Grimesby Rylott
Lyn Harding
Helen Stonor
Angela Baddeley
Dr. John Watson
Athole Stewart
Mrs Staunton
Nancy Price
Mrs. Hudson (uncredited)
Marie Ault
Director of Photography
Freddie Young
Producer
Herbert Wilcox
Adaptation
W.P. Lipscomb
Story
Arthur Conan Doyle
Director
Jack Raymond
Editor
Maclean Rogers
Art Direction
Lawrence P. Williams
Sound Recordist
L.F. Odell