The boys accompany a teacher and her singing-and-dancing group to Central America to raise awareness of the rain forest. Also: Kenny falls for a choir member; and Kyle has trouble mastering the choreography.
Residents start to spontaneously combust, prompting Stan's geologist father to investigate.
Chef gets a visit from his mother when the boys feel his bride-to-be has taken their place in his heart.
The boys discover two nearly extinct animals while camping on the banks of Stark's Pond.
The boys take a shop class taught by an eccentric, and urge a schoolyard fight between classmates Tweek and Craig.
Cartman sues Stan for sexual harassment.
Shelly baby-sits Cartman.
A meteor shower hits town, and Stan's sister Shelly babysits Cartman while Mrs. Cartman goes to a "meteor party."
Kyle and Ike go on a camping trip while South Park residents wait for a meteor shower to begin.
On Halloween, the boys are plagued by fifth graders and the town is overrun by pirate ghosts. Music group Korn assists, and sings "Falling Away from Me."
Adults try to counter when the town's children become obsessed with a fad from Japan, whose government reveals their master plan behind the craze.
Kyle tries to teach his new rival about love; the boys compete against home-schooled kids in the annual spelling bee; and Cartman's mom agrees to teach him at home.
Starvin Marvin returns in a stolen U.S. spaceship, and enlists the boys to help feed his Ethiopian village. The CIA is among their pursuers.
The town holds its annual reenactment of a Civil War battle, and Cartman suits up for the Confederacy with visions of glory.
Mr. Hankey and South Park citizens celebrate the holidays with musical numbers from his Christmas Classics Album.
"Are You There, God? It's Me, Jesus" purports to "answer age-old questions about who we are and what we're all about."
The boys and their class travel to the first "Worldwide Recorder Concert" in Arkansas, where Mr. Garrison confronts the demons of his childhood while visiting his parents.