1939's "The Mystery of Mr. Wong" was Boris Karloff's second entry in the six picture Monogram detective series, shooting in early February following completion of Universal's horror comeback "Son of Frankenstein." Lacking the numerous twists offered in his debut, number two just might be the better picture, boasting a superior cast and a more restrained Grant Withers, making his teamwork with Wong more believable. Morgan Wallace, present in the final Moto release "Mr. Moto Takes a Vacation," plays overbearing art collector Brendan Edwards, who smuggles out of China a priceless stone known as the 'Eye of the Daughter of the Moon,' which signals death for anyone who dares to steal it. Sure enough, Edwards is shot dead during a game of charades in front of dozens of guests, the would be shooter, Peter Harrison (Craig Reynolds), firing a pistol filled with blanks while playing a jealous husband, the victim's young wife Valerie (Dorothy Tree) also standing next to her spouse. Mr. Wong had learned of Edwards' possession of the jewel shortly before his death, and was aware of a note naming his killer in the event of his demise; naturally, both are missing from the safe in his upstairs study, though we see the maid Drina (Lotus Long) remove the message herself from an already opened safe. It's clear that Peter has developed feelings for Mrs. Edwards, as has houseguest Michael Strogonoff (Ivan Lebedeff), who has been living with the Edwards in the hopes of starting a singing career in America. Also attending the ill-fated party is fellow criminologist Ed Janney (Holmes Herbert), quick to assist in the murder investigation, while the Edwards attorney, Carslake (Hooper Atchley), supplies another motive with his client's insistence on making out a new will disinheriting wife Valerie, but not living long enough to sign it. After the maid perishes from a poisoned cigarette, Wong gathers all the suspects at his home to examine the missing document naming the culprit, going over each suspect and their reasoning before coming upon the guilty party in a well thought out and logical fashion; were it not for a significant bit of information kept from the audience, it might have been the best climax of them all (the plot was a rehash of the 1931 Tiffany independent "Murder at Midnight"). Craig Reynolds would return for 4th entry "The Fatal Hour," Lotus Long would feature twice more, and Dorothy Tree would actually graduate to a Sidney Toler entry at Fox, "Charlie Chan in City in Darkness." Boris moved on to complete his Warner Brothers pact with "British Intelligence" before reporting back to Monogram for "Mr. Wong in Chinatown."
