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.

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

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

Earl throws his hat into the ring as a candidate for Chief Elder, but he's likely to have his head handed to him by his opponent, B.P. Richfield.

The four-leggers are blamed for the failing economy and legislation is passed to make their presence in Pangea illegal.

Ethel reads the Baby a story called "If You Were a Tree" about a dinosaur tree pusher who gets struck by lightning and swaps souls with the tree he's trying to demolish.

Questions about life's meaning plague the population, so the Elders dictate a belief system called "Potatoism."

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

Earl has the honor of tossing his mother-in-law into the tar pits on "Hurling Day."

Fran and Earl face an untimely extinction when the baby enters his "terrible twos."

An archaeologist documents dinosaurs' way of life as they may have existed long ago, but clips from previous episodes tell a different story.

Charlene wants to make a fashion statement with an expensive coat, but the coat leads her into a vain attempt to achieve status.

Charlene is charged with heresy and jailed after submitting her homework assignment claiming that the world is round and not flat.

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 resorts to using Thornoids in an attempt to impress a girl at school.

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 feels her family is neglecting her, so she gets their attention by winning the school talent show but her rising fame is riding on the backs of three young cavelings she found in the forest whose mother is looking for them.

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

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.

Earl lays an egg when he asks his boss for a raise, and Fran lays an egg--literally.

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.

When Robbie flubs his initiation into the Young Males' Carnivore Association, Earl fears his son may be a herbivore.