South Park: Season 5, Episode 13

5 - 13: Kenny Dies

Kenny develops a terminal illness and is incredibly sick. All the boys react differently to this - Kyle stays by Kenny's bedside, Stan avoids seeing him because he doesn't want to see him suffer, and Cartman seeks a cure using stem cells. When a truckload of aborted fetuses falls into Cartman's possession, he lobbies Congress to make it legal to use them for research.