Basil Rathbone
Sherlock Holmes
Nigel Bruce
Dr. John H. Watson
Patricia Morison
Mrs. Hilda Courtney
Frederick Worlock
Colonel Cavanaugh
Harry Cording
Hamid
Carl Harbord
Inspector Hopkins
Holmes Herbert
Ebenezer Crabtree
Edmund Breon
Julian 'Stinky' Emery
Patricia Cameron
Evelyn Clifford
Mary Gordon
Mrs. Hudson
Ian Wolfe
Commissioner of Scotland Yard
Leyland Hodgson
Tour Guide
Marjorie Bennett
Antique Shop Assistant (uncredited)
William H. O'Brien
Detective at Murder Scene
