As a disclaimer - This is not an episode about the amazing Dreamworks film of the same name. That may come at some point, but it is not this episode. 

There's some lore here, but our intrepid Cars-casters are scraping the bottom of the barrel to find it. Why did they do the episodes where Mater died and there were ghosts and dinosaurs and credible evidence of aliens first? It makes the rest seems a lot less... exciting, I guess?