This 1971 TV thriller made studio executives take notice of its young director, Steven Spielberg. Businessman David Mann (Dennis Weaver) is in a hurry to get to an appointment, so he innocently passes a slow-moving big rig on an isolated highway to be on his way. But that turns out to be the wrong move. Soon, he finds himself mercilessly pursued by the truck and its mystery driver, whose motives are unknown. Will Mann ever break free?