Duel
This is the TV movie that put Steven Spielberg on the map, shortly before he made The Sugarland Express. Working from a script by Richard Matheson, the film stars Dennis Weaver as a mild-mannered traveling salesman who unintentionally angers the driver of a semi truck. Suddenly, the truck is not only riding his tail but trying to run him off the road. No matter what he does (pulling over, stopping at a diner, calling the cops), he can't get rid of it. Spielberg makes the wise decision of never showing the driver, even as he cranks the voltage on the film's suspense elements.
