Think Fast, Mr. Moto

Japanese sleuth Mr. Moto (Lorre) is trailing diamond smugglers and boards a ship bound for Shanghai. He befriends Robert Hitchings (Beck), the son of the ship's owner. Robert has fallen for singer Gloria (Field) who's tied in with the smugglers and, upon their arrival, Moto must sort out the criminals from the patsies. More action-packed than the Charlie Chan mysteries although Mr. Moto is equally inscrutable. Based on the J.P. Marquand novels. First in the series.