The Mystery of Mr. Wong

The second in the series of Mr. Wong features starring Boris Karloff finds wealthy gem-collector Brandon Edwards gaining possession of the largest star sapphire in the world, the 'Eye of the Daughter of the Moon', after it has been stolen in China. Edwards, at a party in his home, confides to Mr. Wong that his life is in danger. During a game of Charades, Edwards is mysteriously shot dead and the gem disappears. Unknown to Wong, the jewel is in the possession of Edwards' maid, Drina, who intends to return it to China, but she is murdered also, and the gem is taken again. After one more murder—the suspect list is dwindling—Wong exposes the killer, turns him over to Police Inspector Street, and Wong orders his manservant Willy to return the gem to China.

• Boris Karloff as James Lee Wong
• Grant Withers as Police Captain Sam Street
• Dorothy Tree as Valerie Edwards
• Craig Reynolds as Peter Harrison
• Ivan Lebedeff as Michael Strogonoff
• Holmes Herbert as Prof. Ed Janney
• Morgan Wallace as Brandon Edwards
• Lotus Long as Drina, the Maid
• Chester Gan as Sing, the Butler
• Hooper Atchley as Carslake
• Bruce Wong as Asian Man
• Jack Kennedy as Policeman
• Joe Devlin as George, the Detective
• Lee Tung Foo as Willie (as Lee Tong Foo), Wong's Butler and door opener.
• Wilbur Mack as Ballistics Expert
• Dick Morehead as police detective
• I. Stanford Jolley as Charades Player (uncredited)

• Boris Karloff filmography

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• The Mystery of Mr. Wong at the American Film Institute Catalog
• The Mystery of Mr. Wong at IMDb
• The Mystery of Mr. Wong is available for free download at the Internet Archive