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.

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

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.