John Carpenter's Tales of Science Fiction: Twitch #3

Synopsis

An alien entity is slowly gathering material to build a hive mind - and your brain is on its wish list! It's up to the unlikely duo of an astrophysicist and an Los Angeles county sheriff to save humanity, one bullet at a time. But it's tough to aim straight when you can see dead people shambling toward you, and the end of the world just over the horizon, and your eyes begin to twitch...