Synopsis
The famous Borgia Pearl, a valuable gem with a history of bringing murder and misfortune to its owner since the days of the Borgias, is brought to London, thanks in part to Sherlock Holmes. But before long the jewel is stolen, due to an error on Holmes' part, and shortly thereafter, a series of horrible murders begin, the murderer leaving his victims with their spines snapped and surrounded by a mass of smashed china.
Cast

Basil Rathbone
Sherlock Holmes

Nigel Bruce
Dr. John Watson

Dennis Hoey
Inspector Lestrade

Evelyn Ankers
Naomi Drake

Miles Mander
Giles Conover

Ian Wolfe
Amos Hodder
Charles Francis
Francis Digby, curator

Holmes Herbert
James Goodram, courier

Richard Aherne
Museum Guard Bates

Mary Gordon
Mrs. Hudson

Rondo Hatton
The Hoxton Creeper

Harry Cording
George Gelder (uncredited)

Billy Bevan
Constable With Food Tray (uncredited)

Leyland Hodgson
Customs Officer (uncredited)
Eric Wilton
Chauffeur (uncredited)

Lillian Bronson
Maj. Harker's Housekeeper (uncredited)
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