South Park: Season 4, Episode 6

4 - 6: Cherokee Hair Tampons

Kyle becomes sick and needs a kidney transplant, but his mother is convinced that natural cures from a New Age store are better. Kyle's condition gets worse, and it turns out that the only person who is a compatible kidney donor for Kyle is Cartman, and Cartman's not letting his kidney go without a fight. Meanwhile, Mr. Garrison is on forced leave from the school, and sets out to write a romance novel.