Sherlock Holmes
Doctor Watson
Professor Moriarty
Dr. Franz Tobel
Charlotte Eberli
Inspector Lestrade
Sir Reginald
Mrs. Hudson
Jack Brady (uncredited)
Peg Leg (uncredited)
Mueller (uncredited)
Professor Frederic Hoffner (uncredited)
RAF Officer (uncredited)
Swiss Waiter (uncredited)
London Bobbie (uncredited)
Braun (uncredited)
Scotland Yard Detective (uncredited)
Gottfried (uncredited)
Kurt (uncredited)