Crusher

Darren's cousin was never the sharpest pencil in the box, and when an attempt to get his home video on television by faking a fall from a high dive misfired, the pencil was reduced to a stub. After a ship-wrecked alien takes up residence in his cousin's vacant head, Darren finds himself dragged off to NASA for help, only to be accused of orchestrating an alien invasion. Fleeing for their lives, he and his alien zombie cousin must search out and stop the true invasion massing to overrun the Earth.
The question is whether Darren can resist strangling his companion before everything we know is obliterated.5 stars".