TerrorVision

A civilisation on a distant planet's found a way to resolve its garbage problem; by turning it into energy, and transmitting it into space. A flaw in the system's found when the signal's accidentally picked up on Earth by the Putterman family's satellite dish. While this would ordinarily be just another mess, this particular transmission contains a hungry monster who quickly begins snacking on the Puttermans and their guests. Only the son has any knowledge of what's going on, but nobody believes him.