"Most interesting case," Charlie Chan says. "In four months, three persons are murdered by bite of cobra fang."
The mysteriously murdered victims are all employees of a bank whose vault holds a valuable cache of radium. Crooks are after said radium and Charlie Chan is assigned to protect it. And the murders are not done by an actual cobra, it turns out, but by one of those dastardly sharp-tipped poison-dispensing devices hidden in a clever place....
This suspenseful series entry includes less comic relief than usual but moves fast and builds to an exciting climax that feels more like an action-adventure picture than the usual gather-the-suspects Chan resolution.
Number Three Son Benson Fong is on hand to help, as is chauffeur Mantan Moreland—so there are a few decent laughs. (Charlie Chan, fed up with his assistants: "You remain here until I find doghouse big enough to hold both of you.") Sidney Toler moves with confidence and even a bit of a swagger as the great detective.
Much of the action takes place in a diner that contains a unique jukebox: A coin is dropped and a song selected—but then instead of a record playing automatically, the request goes to a person sitting in a little room who then puts on the record manually. A video camera allows this disc jockey to view the interior of the diner and even communicate by microphone when desired. –I've never seen such a setup in real life but I have to say that the next time I see a jukebox I will be looking at it more closely.
While no one would mistake this Monogram effort for anything bigger, imaginative touches and familiar characters make it well worthwhile for Chan fans.