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The children are to sent to Costa Rica as part of a choir to stop deforestation, but end up deciding the rain forest isn't worth saving.
Stan and Kyle rescue a man who has been trapped in the ice since 1996 and he attempts to readjust to society in 1999.
The boys are partnered with Tweek to write a current events papers and he suggests they write about "Underpants Gnomes." Meanwhile, Tweek's parents' coffee shop is being threatened by a big corporate shop.
Stan runs away to visit Cartman's relatives in Nebraska; Cartman and his Uncle break Charles Manson free from prison and discover the real meaning of X-Mas.
An evil version of each of the boys (and a good version of Cartman) come from a parallel universe.
Chef gets used for calling out Alanis Morisette for ripping off a song of his. The boys get help from Chef's famous musician friends to raise money. Mr. Garrison thinks Mr. Hat is trying to take Mr. Twig's life.
A couple wins a free trip to South Park off a game show; Kyle uses Cartman to win a bullriding competition; the town begins worshiping a false idol.
The boys make a clubhouse so they can get the girls to play "Truth or Dare;" Stan's parents get a divorce.
The town is brainwashed by the new curator of the planetarium; Cartman auditions to be in a Cheesy Poof commercial.
The boys' mothers force them to hang out with Kenny to try and catch chickenpox; Kyle's mother tries to rekindle an old friendship between her husband and Mr. McCormick.