In the 12th-season finale, vampire sightings at school anger the Goth kids, who are upset when they become indistinguishable from the bloodsucking interlopers in the eyes of their peers.

The boys are startled to learn that their popularity at school is waning when they fail to submit to the latest fad, which actually makes Butters cooler than they are.

South Park residents join the rest of the country in celebrating the election of a U.S. president, who moves a new administration into the White House ahead of schedule.

The boys discover the reason for the global attacks by oversize guinea pigs, but first they have to find their way out of the Andes.

Cartman enlists the help of rival Craig when the boys spot an easy opportunity for financial gain from a global crisis.

Wendy courts trouble when she vows to beat up Cartman after school.

Butters stands with Cartman as he confronts the Chinese after a tragic event.

A class trip to a living museum that recreates 1800s Colorado leads to a hostage situation for some of the boys.

When a lack of Internet access in South Park sparks panic in the community, Randy takes his family to California in search of a signal.

Cartman takes over Ms. Garrison's class when the teacher's personal crisis causes her to be removed from the classroom.

When Canada goes on strike, the boys find themselves in the thick of negotiations for a settlement, and the void in U.S. jobs is filled by replacements from Denmark. Meanwhile, Terrance and Phillip are on the fence about joining the strike, but are shocked by its fiscal consequences.

Suspicions by friends and family of Kenny's drug use play out in an homage to the 1981 animated fantasy "Heavy Metal."

The boys meet Britney Spears while she's on a search for seclusion in the Colorado mountains, and Stan and Kyle eventually take on the responsibility of getting her to the North Pole.

In the 12th-season premiere, Cartman faces an uncertain future after a routine tonsillectomy reveals a more serious condition.