Aliens land in South Park and kidnap Kyle's little brother.

Cartman wins the school's essay contest, and a celebrity comes to town.

The boys' hunting trip is threatened by activity from a nearby volcano and a mysterious creature.

Stan's dog explores his sexuality.

A genetic engineering experiment unleashes Stan's mutant twin.

With the help of Stan's grandfather, the kids summon the Grim Reaper.

Trick or treat in South Park is interrupted by an outbreak of "Pink Eye."

Government authorities mistake Cartman for a starving African child and send him to Ethiopia.

When Kyle's musical holiday pal Mr. Hankey shows up, it makes for a memorable Christmas in South Park.

Jesus and Satan fight a battle for spiritual domination, which conflicts with Cartman's birthday party.

Cartman gets probed by aliens.

Chef sings a song to cheer up the boys.

A giant satellite emerges from Cartman's ass.

Ike gets abducted by aliens

South Park cows are turning inside-out.

Mr. Hat refuses Kyle's request to leave school and save Ike.

Cows try to escape to Denver.

Cartman is under alien control via the thing in his butt.

Aliens kill Kenny.

Cartman can't resist Chocolate Chicken Pot Pie.