When overwhelming urges to do the mating dance arise in Robbie, Earl prefers not to discuss it, but Fran waltzes into Robbie's classroom to educate the kids about it.

Another one of the infomercial for a home course in how to become a paleontologist is supplemented by clips from previous episodes. Featuring the past clips from Season 2 to Season 3.

The baby goes gaga over a hippo named Georgie, the latest children's idol. But when Earl dresses up as Georgie, he's arrested for copyright infringement.

Earl, Robbie and Roy stumble into a tar pit when they take the Baby into the forest for the traditional dinosaur Wilderness Rite of Passage.

When too many overworked employees drop dead from exhaustion, businesses give dinosaurs two weeks off for a vacation; B.P. Richfield advises Earl to bring his family to WeSaySo Land, which is supposed to be a fun amusement park for the family. What the Sinclairs find is an overpriced, cow themed park that is newly under construction, and they have to stay for 14 days.

Charlene becomes her father's boss when Richfield is pressured into hiring women. The only problem is, Dad won't listen to her.

Efforts to solve an environmental crisis put the dinosaurs on the road to doomsday.

It's a big problem when the government blames its poor economy on four-legged dinosaurs and enacts anti-four-legged laws. So in order for Monica to stay in the land of Pangia, Roy marries the outlawed Monica so that she can stay in the country for good, but this also causes big effections and errors on Roy's friendship with Earl and his job the WeSaySo Corporation.

In this fairy tale episode, Ethyl tells Baby a story about a tree pusher Earl who was about to push down a spirit tree which switched his soul for him become a tree and the spirit tree to become Earl. When Roy brings Spirit home to the Sinclair family, he can't help to understand what has happened to him, when Earl realizes that he's stuck in the tree. Fran later believes the Spirit when he tells her that she is not Earl and that Earl is in the tree. After words, Fran goes to find Earl and Spirit after last night being taken away from the house by the WeSay So Policemens. Spirit switched Earl's soul back to were it belongs. And everything was over with but the tree with the Spirit in it was destoryed.

A wild plant has a weird effect on the dinosaurs--it makes them dopey and happy, to the exclusion of everything else.

The Baby swears there's a monster under his bed, but no one believes him--until it starts dragging victims into its hole.

The four-legged dinosaurs encroach on the pistachio-nut supply of the "normal" dinosaurs...and that means war.

Earl assumes the powers of a superhero, but he's bound to use his might only for the Wesayso Corp.

Earl helps Fran's friend Monica get a job as a tree pusher, but she's no pushover when she's harrassed by a predatory male.

When the Sinclair baby sprouts a golden horn, he is trumpeted as the prophesied King of the Dinosaurs.

Earl buys Fran two rare grapdelites for dinner, unaware that they are the last of their species.

A power struggle erupts between the Wesayso Corp. and Robbie after he invents a way to generate energy as a science project.

Earl, Roy and Charlene pose as entertainers and rush to the front to retrieve Robbie.

When Charlene's class is assigned to think of an original idea, her world-is-round theory falls flat, and she's tried for heresy. She get's arrested stating that the world is round and everybody believes that the world is flat. So she decides to prove them wrong by traveling with Robbie to the end of the earth to there sudden death. But they return and everyone realized now the world was round.

The males, including Earl, Robbie, and the Baby, go into the wilderness to rediscover their ""reptiles within,"" while back home the girls warm their cold blood with the boys' beer.

Robbie doesn't feel that much comfortable with being the weakest dinosaur in the family, so in order for him to become very strong and muscular, he uses one of Dolf's favorite foods to make him become very strong and that's when he starts giving Caroline the hots and tries to woo her love.

Feeling a need to have a job outside the home, Fran goes to work at a halfway house for amphibians, leaving Earl to take over the household day shift and look after the kids.

Robbie crosses over to the swamps and gets sold on the mammals' ""swamp music,"" but they're liable to be sold out in a dinosaur record deal, which Robbie orchestrated.

Robbie poses as a space alien and orders Earl to get involved in cleaning up Earth, never imagining that he would quit his job to launch an environmental crusade.

Charlene grabs the attention of her family and other audiences with her amazing performing humans. But it's not that easy when she finds out the mother wants her children back from Charlene and Robbie thinks that she's pushing them to far to make her very famous and become a superstar. When she later appears on the State Fair she confesses about what was very wrong for her and everyone else to be doing.