Them plot
A meteorologist Simon Trent (Scott Patterson) stationed on the California peak of Mount Pious collides with aliens. The weather station is razed to the ground, but his rescuers refuse to believe his story. A few months later, in Seattle, the meteorologist's sister is killed by a certain Berlin (Tony Todd), who is in reality an alien. It turns out that the aliens are mastering DNA on Earth to prevent them from becoming extinct somewhere in space, where they are home. They can no longer reproduce. The meteorologist and his cousin bring together a group of people to fight the aliens.