Mystery Crime Thriller
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.
Directed by
Roy William Neill
Ian Wolfe
Commissioner of Scotland Yard
Basil Rathbone
Sherlock Holmes
Nigel Bruce
Dr. John H. Watson
Mary Gordon
Mrs. Hudson
Marjorie Bennett
Antique Shop Assistant (uncredited)
Holmes Herbert
Ebenezer Crabtree
Lillian Bronson
Minister's Wife (uncredited)
Frederick Worlock
Colonel Cavanaugh
Charlie Hall
Cab Driver (uncredited)
Frank Mills
Pub Patron (uncredited)
Patricia Morison
Mrs. Hilda Courtney
Olaf Hytten
Alfred - Auction House Bookkeeper (uncredited)
Cyril Delevanti
Convict at Dartmoor Prison (uncredited)
William H. O'Brien
Detective at Murder Scene
Leyland Hodgson
Tour Guide
Harry Cording
Hamid
Frank Baker
Photographer
Jack Curtis
Pub Patron (uncredited)
Edmund Breon
Julian 'Stinky' Emery
Carl Harbord
Inspector Hopkins
Sally Shepherd
Patricia Cameron
Evelyn Clifford
Wallace Scott
Joe Cisto
Bobby Hale
Pub Patron (uncredited)
Alexander Pollard
Crabtree's Assistant at Auction (uncredited)

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