Calling this a typical Moto film is not a bad thing. After all, this series from Twentieth-Century Fox was about the equal in quality to their other series, Charlie Chan. The big difference being that Moto is more a "gun for hire"--a man who would play private detective or even mercenary in his films. Unlike the squeaky clean and rather sedate Chan, Moto is more physical and not above twisting the law or even killing someone. Sadly, he didn't kill anyone in this film--always a trademark of a great Moto film!
Moto is on his way to Puerto Rico to investigate a diamond smuggling ring. However, on the way, he is laid out due to an appendicitis and it looks like Moto might have to drop the case. However, being a very sneaky character, there's a lot more to the story than this.
Along for the ride is Warren Hymer, who plays Moto's new friend who tags along during the investigation. Having Hymer in the film makes sense, however, as the film was originally planned another Chan film. But, since Warner Oland had recently died, the script was adapted for Peter Lorre's series. In the usual role of Number One or Number Two son is Hymer--who gets into trouble and makes a nuisance of himself just like he was an honorary Chan himself!
Overall, well written, exciting and up to the usual high standards of the series. The only serious knock I have against this film is that although it's set in Puerto Rico, there's no one who remotely looks or sounds Hispanic in the film. Of course, considering they have a German guy playing Moto, I guess this shouldn't come as much of a surprise.
