Earl lets the Baby stay up to watch a monster movie and then he can't sleep because he sees a monster under the bed. When Fran and Earl retreat to a motel to sleep, Charlene and Robbie find out Baby wasn't imagining things.
Earl falls into toxic waste and develops the powers of flight, heat ray vision, and accurate weight guessing. He decides to become a superhero and hopes it will make him a hero to the Baby, who idolizes a superhero on TV.
When the Baby asks Earl where dinosaurs came from and why, the questions are repeated throughout all Pangea and raise a panic until the Chief Elders declare all questions can be answered by their newfound religion: Potatoism.
Earl's plans for the weekend are shot when he has to drive Ethyl to a school reunion. Fran takes advantage of getting Earl out of the house to set up a family portrait, much to the dismay of Robbie, Charlene and the Baby.
When a tree falls on Earl at work and he breaks his foot, Richfield fires him and Robbie sues the company for medical costs. But the jury decides to award Earl a sum of $800 million and Earl lets his new-found wealth go to his head.
Baby reaches his second birthday and it's anything but a celebration as he enters the dreaded Terrible Twos and wreaks havoc on the entire Sinclair household.
Every May, the Bunch Beetles are supposed to eat a rapidly growing plant, but they are extinct save for one. When Richfield enlists Earl to fix the problem, he only make things worse: He irrevocably changes nature for the worst.
Charlene's scent gland comes in and Fran explains the one boy who is attracted to her scent is the one she's destined to marry. But Charlene puts out fumes of burning rubber and attracts the school janitor who aspires to be a tree pusher.
Robbie and Charlene go against Earl's orders and sneak out to see his estranged sister, Pearl, a country star, perform. Roy falls in love with Pearl and plans to settle down with her, despite Earl's protests.
After seeing a TV show about wealthy lifestyles, Earl makes a deal with the devil for a Fernhill mug thinking it will make him happy. As a result he alienates himself from his friends, who he thinks are beneath him now.
When too many overworked employees drop dead from exhaustion, businesses give dinosaurs two weeks off for a vacation; Richfield advises Earl to bring his family to Wesaysoland. They find an overpriced, cow-themed park under construction.
Charlene attempts to break into the male-dominated workforce and get a job to pay for her summer wilderness trip but finds all businesses work under the Old Boys Network that is determined to keep females tied down.
Earl's game day is interrupted when he has to take Baby into the woods to show Baby that the world doesn't revolve around him. But when Earl, Roy and Robbie unknowingly step into a tar pit, they need the Baby to save them.
When Earl dresses up as Georgie, an orange hippo from a children's TV show, he is arrested for copyright infringement. In jail, Earl finds out that Georgie has a sinister plan in mind for his merchandising empire.
