Think Fast, Mr. Moto

... loosely based on the books by John Marquand, from 20th Century Fox and director Norman Foster. After a series of murders occurs in San Francisco, the mysterious Mr. Moto (Peter Lorre) boards a cruise ship to China, where he befriends Bob Hitchings (Thomas Beck), the son of the owner of the cruise line. Bob has fallen for a moody passenger named Gloria (Virginia Field). Once they make landfall in China, things get dangerous for them all.

This initial outing in the series is different in at least one respect: Mr. Moto's motives and allegiances are kept a mystery for most of the picture. In fact, he's even presented as a possible suspect, or at least in league with the villains. Despite it being another regrettable instance of casting, Peter Lorre is outstanding as Moto, charming, funny, mischievous, and just a little creepy. His performance elevates what would have been just another routine mystery programmer of the day.