Produced in Thailand, 1 2 3 Monster Express (1 2 3 Duan Mahaphai) moves along so smoothly that one would never guess that the film's original director died early in the filming. The eponymous "Express" is a rapid-transit bus service, running from Bangkok to the outer provinces and back again. Usually, this run is uneventful: on this particular occasion, however, several passengers die mysteriously. Things get even stickier when the remaining passengers discover that a time bomb is on board. 1 2 3 Monster Express was one of Thailand's biggest box-office hits. ~ Hal Erickson, All Movie Guide