Tragedy strikes when one of the boys repeatedly ignores reminders about leaving the toilet seat up in the Season 16 premiere.
Cartman targets a specific—and vulnerable—clientele when he starts his own shopping channel for gems, while Stan researches the value of a piece of jewelry that was a gift from his grandfather.
An evolutionary development poses a grave threat to humanity.
The town's Easter-egg hunt may be canceled due to rumors of a vicious beast that Cartman claims to have caught on film.
Stan organizes an antibullying video when Butters is tormented by an unlikely predator.
The boys try zip-lining in the Colorado mountains on the last day of spring break, but their adventure takes a dangerous, life-threatening turn.
A romance for Cartman may finally become a reality when there's a new girl at school.
Randy's campaign to prevent head injuries in football radically changes the way the game is played, but the new rules become a national sensation and even make a South Park student a star athlete.
Cartman finally comes to the realization that he's overweight, but declares that the solution is to ride around on a mobility scooter. Also: Cartman learns he has a rival in a young reality-TV star.
Kyle suspects that his mother is having an affair with a deliveryman; Cartman installs a home-security system.
When Butters starts acting out at school, his parents realize it's time to tell him why he's not like all of the other kids. He must travel to a foreign place to learn the ways of his people. It will be a difficult trip for a young boy to make alone, so Butters chooses Kenny to travel with him to the distant and secluded island of Hawaii.
The boys' plans to go trick-or-treating as their comic-book heroes, the Avengers, hit a snag when Stan's dad needs his son's help with a new business venture.
An icon is implicated in a doping scandal, so supporters start cutting off their symbolic wristbands.
In the series 16 finale, Cartman believes he can affect the outcome of the 2012 presidential election.