I enjoyed this episode not as much as others but this one is telling us a bit of background of Cletus Poffenberger, our favorite mad scientist.
It begins with Larry wanting to do a story about Cletus and asks Tyler about it who starts to tell him the story about Cletus and his 'pet' 4-12.
Cletus is shown in his living place and his 4-12 escapes him. Cletus follows him (good run for a 65+ year old ^^) and at some point collapse in the desert where Burt finds him. He takes him to Perfection and Cletus starts rambling like a lunatic abount a monster and of course nobody wants to really believe him. Nancy takes him into her home.
The next scene shows Tyler and Rosalita talking to Harlowe who rides off. The next few minutes show some kind of beginning of a realtionship between Tyler and Rosalita.
Meanwhile Harlowe encountered the monster who killed his horse. He calls in the others and Burt finally starts thinking about this monsters.
He picks up Cletus and they go to find 4-12. Cletus tells him about the lab that was hidden and blown up. But Burt doesn't believe him until Cletus can show Burt the road to the lab.
Meanwhile 4-12 enters the town and kills a biker (someone had to die in the episode, since it happens in every episode ^^). They flee in Tylers car, who can escape from it and pick up Rosalita and Harlowe. Then they meet back in town with Burt and Cletus.
During the next scenes it is revealed that 4-12 has x-ray vision and that El Blanco won't eat him because of his bad taste.
With no guns they have to kill 4-12. So they do what Burt does best. 'Do what you can with what you got'. They build a flamethrower and manage to kill the creature.
Cletus buries it and Nancy brings him back to his home.
All in all, this episode finally reveals how the folks know Cletus Poffenburger after he showed up in Episode 2 with everyone knwoing him.
The only thing I wondered about it the timeline this episode appeared in. It must have happened after Episode 1, because Tyler was already there but way before Episode 2 because of Cletus saying "Been long my dear, don't know where to start" which indicates a longer periode of not seeing each other.