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.
Elenco: Basil Rathbone , Nigel Bruce , Dennis Hoey , Evelyn Ankers , Miles Mander , Ian Wolfe , Charles Francis , Holmes Herbert , Richard Aherne , Mary Gordon , Rondo Hatton , Harry Cording , Billy Bevan , Leyland Hodgson , Eric Wilton , Lillian Bronson .