The Day the World Ended

The Day the World Ended is a 2001 American science fictionhorror television film and is the fourth in the Creature Features series broadcast on Cinemax. It stars Nastassja Kinski, Randy Quaid, and Bobby Edner.

This film finds an alien, who is misunderstood, bent on hunting down and devouring people. A school psychologist, Dr Jennifer Stillman Nastassja Kinski investigates the death of a students mother and finds that the boy Bobby Edner believes he is the son of the being. His earthling father Randy Quaid is also a doctor, who has the boy in his care and holds that it is all in the boys imagination.

Source: Wikipedia