

A meteor crashes in the desert, bearing single-celled alien organisms that evolve into monstrous creatures determined to replace all life on Earth with their kind. It's up to the eccentric, irreverent scientists Ira Kane and Harry Block – with a little help from Lt. Lucy Mai, teenage wannabe fireman Wayne Green and the odiferous alien tracker, Gassie – to stop the "Genus" and its devious humanoid manifestation, Scopes, before life as we know it goes the way of the dinosaurs.