Plot
A convicted thief in Dartmoor prison hides the location of the stolen Bank of England printing plates inside three music boxes. When the innocent purchasers of the boxes start to be murdered, Holmes and Watson investigate.
Trailer
Cast
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
Frank Baker
Photographer
Sally Shepherd
Wallace Scott
Joe Cisto
Jack Curtis
Pub Patron (uncredited)
Cyril Delevanti
Convict at Dartmoor Prison (uncredited)
Charlie Hall
Cab Driver (uncredited)
Olaf Hytten
Alfred - Auction House Bookkeeper (uncredited)
Frank Mills
Pub Patron (uncredited)
Lillian Bronson
Minister's Wife (uncredited)
Bobby Hale
Pub Patron (uncredited)
Alexander Pollard
Crabtree's Assistant at Auction (uncredited)
