To keep dry in the rain, Pickles puts a bucket on Milo's head and sends him off to school. Funzie, the cool guy, thinks Milo's bucket is hip, so the next day, everyone's wearing a bucket on their heads. Milo finds himself running with the in-crowd, so he sets out to launch a strange new line of apparel -- with disastrous results.

Pickles decides to quit smoking, but she replaces one addiction with another when she channels her nervous energy into becoming a reckless thrill-seeker. Her decision comes much to the dismay of Bob, who worries about her safety, and Milo, who resents her unseating him as the crazy one in the family.

Bob fears his career is going nowhere. That is, until marketing genius Milo's sales take off for his new energy drink, "Manic," which improves Bob's co-workers' productivity. But the real secret of his success is found out when Bob's company anoints Milo as their new CEO.

Milo and his friends crash a party thrown for the Mayor's daughter, Debbie Bledsoe, and they cause the Debbie's new locket to be tossed into the sewer. The zaftig Helga goes after the gift and gets lodged in the pipe, plugging it up like a human cork. The hill people and rescuers work feverishly to rescue... the locket, and leave Helga blocking the main water line -- just one flush away from the great beyond. Helga causes a disruption in the water supply to valley, but the hill people pay no attention -- until their water is cut off too.

Milo runs for school president against Debbie Klimer, leader of the snobby Debbies, and he loses -- but then his opponent suffers a freak accident. The Klimer family fakes young Debbie's death while she goes under the plastic surgeon's knife, but the operation is less than successful and Debbie returns looking like The Phantom of the Opera. Shunned by her upscale family and friends, The Oblong clan and the valley kids take in the reject Debbie as one of their own. But when Debbie's cheerfulness starts getting on everyone's nerves, the valley kids turn to the freakish school nurse to get Debbie back with the in-crowd.