Tremors - Season 1 Episode 6 Hit and Run
Overview: Two Las Vegas criminals named Max and Frank have to lay low before their next crime. With time on their hands, they go to Perfection to settle a disagreement about the existence of Graboids. They soon enough encounter El Blanco, which kills Max and also eats the key needed for their crime. And the only way to get it back is to kill El Blanco.