Earl anticipates a promotion as he awaits a dinner with Richfield; Robbie brings home a "pet" human.

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

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.

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.