Slither

In Wheelsy, South Carolina, a meteorite crashes near the estate of Grant Grant, a wealthy local man who discovers a pulsing alien organism in the crater. The slug-like parasite burrows into Grant and begins rewriting him: he develops a ravenous appetite, grows physically grotesque, and becomes a node in an alien hive consciousness stretching across space. Grant captures local woman Brenda and uses her as a host for alien offspring; she swells to an enormous size and ruptures, releasing hundreds of small parasitic slugs that crawl into people's mouths and absorb them into the hive mind. Chief Bill Pardy leads the town's resistance. Grant's wife Starla tries to reach what remains of her husband. Grant continues to transform into a massive tentacled abomination driven by alien hunger. Starla lures Grant close with false affection while Bill shoots his exposed organs with a propane tank, killing him. The hive mind collapses. The surviving townspeople emerge from the nightmare. In the final shot, a cat sniffs a surviving slug in the mud.