The Mr. Moto films went out of circulation immediately after Pearl Harbor. As we can see in this film, they reflected a hope that circulated in John P. Marquand's England (and had some currency in the US) that a reasonably 'civilized' (in the European sense) Japan could be negotiated with over China and then used for political leverage against Russia and Germany. This film was released in early 1939; by September of that year, Germany was in Poland, and England and France were allied against it, so the basic premise of the film was made worthless. Shortly after, the Japanese kicked the British out of China, so the basic hope underlying the film became worthless. The film is thus best approached as a kind of fantasy.
It is, specifically, a spy thriller, not a mystery at all; it's more closely related to the James Bond films (which are also largely fantasies) than to the Charlie Chan style 'oriental detective' movies of its own day.
This is the only widely - and cheaply - available Moto film. I've only seen one other Mr. Moto film, a long time ago, and I don't remember it well. It was a fairly faithful adaptation from the original Marquand material, and seemed very complicated, much as the Marquand novels can be. This film, to the contrary, is an original story. It is streamlined and linear in plotting. It appears to have been made rather quickly on not a lot of money, but the film-making is strictly professional. The pacing avoids a lot of lags, and there are moments of real suspense and real surprise.
Thus we have a well-made, enjoyable genre film here; but the main delight of the film is undoubtedly the performance of Peter Lorre. Lorre achieved some respect in Germany and England before coming to Hollywood - where, alas, he was not treated well, as the type for which he was usually cast - 'suspicious foreigner' - was very narrow. Mr. Moto here allows Lorre a star-turn, a hero's part, and surprisingly considerable latitude in interpretation. He is obviously having a grand time here, and delivers a wonderful performance.
Overall, an excellent B-movie, very entertaining if taken on its own terms.
