The boys are waiting for the school bus as usual when the
Mir Space Station crashes and kills
Kenny whose body is then taken to the local morgue. One of the men at the
morgue accidentally leaves a bottle of
Worcestershire sauce open and its contents mix with the embalming fluid, turning Kenny into a
zombie. Kenny bites the two men and leaves in the middle of the night. The next day Kenny rejoins his friends, who are dressed up for a Halloween costume contest.
Stan is dressed as
Raggedy Andy (since
Wendy would be going as
Raggedy Ann, thus making a pair),
Kyle wears a
Chewbacca mask, and
Cartman is dressed as
Adolf Hitler, much to the annoyance of Kyle. A zombified Kenny then joins the boys, but they fail to notice that he actually is a zombie. At school, Kyle becomes more annoyed after discovering that all the other students (as well as
Mr. Hat) are also dressed as Chewbacca, while
Mr. Garrison is dressed as
Marilyn Monroe. Worst of all, Wendy is also dressed as Chewbacca, to which she explains that she changed costumes because she would have looked stupid as Raggedy Ann, and she figured that Stan would realize the same way about dressing up as Raggedy Andy. A stubborn Kyle then decides to make a new costume so he can win the prize, which is two tons of
candy. Both
Chef (dressed as
Evel Knievel) and
Principal Victoria are offended to see Cartman dressed as Hitler, to which Principal Victoria decides to make him a "spooky
ghost" costume to replace his Hitler costume, but the costume resembles a
Ku Klux Klan outfit, which frightens Chef. At the costume contest, which is judged by
Tina Yothers, Kyle is able to dress up as the
Solar System for his new costume, hoping to win the prize. Kenny is able to win second place for his zombie costume (despite it not being a costume at all), and Wendy is able to win first place as well as the two tons of candy (despite wearing the same costume as several other students), much to Kyle's anger at Tina Yothers. Stan ends up winning the "Worst Costume" category and everyone laughs at him, leaving him humiliated and upset with Wendy. A zombified Clyde drowns Bebe while
bobbing for apples. Meanwhile, thanks to Kenny, the mortician and his assistant are mistakenly diagnosed to have "pinkeye", but they become zombies and go around biting other people, turning them into zombies as well. Back home, Chef, who sees the outbreak on TV, tries to warn both the doctor and
Mayor McDaniels (who is having sex with
Officer Barbrady), but his pleas are ignored. The boys are able to go trick-or-treating (with Kyle now dressed up as a
vampire), but they are not able to notice the outbreak, even when Kenny is able to bite every person they meet when going door to door, to which they decide to abandon him afterwards. They arrive at Chef's home, to which Chef arms himself with a pair of chainsaws before noticing the boys and letting them inside. Chef then tells them what is really going on before taking them to the morgue to stop the outbreak. After discovering the hotline number on the Worcestershire sauce bottle, the boys and Chef are chased by the zombies (which includes a zombified Pip, whom Cartman refers to as a "limey zombie"), and Chef ends up becoming a zombie himself while dressed up as
Michael Jackson and performing his own version of "
Thriller" with the other zombies dancing along with him. Kyle is then able to call the Worcester sauce hotline number on the phone while Stan and Cartman are able to defend themselves with chainsaws, which they use to kill the zombies, but Stan hesitates to kill a zombified Wendy upon encountering her. After Kyle learns he has to kill the original zombie (after being told complicatedly by the hotline lady), he discovers that Kenny is the original zombie after remembering that he was the one who was taken to the morgue, and he then kills Kenny by slicing him in half with a chainsaw (to which he then utters out "Oh, my God!
I killed Kenny!"). The zombie disease is broken, and all the zombies turn back to normal (despite having been dismembered with chainsaws). Stan makes up with Wendy and they are about to kiss each other, but he ends up puking on her. The episode ends with the boys mourning at Kenny's grave, and they immediately decide to go home to eat their Halloween candy as well as look at photos of
Cartman's mom, who is on the cover of a porn magazine, much to the annoyance of Cartman throughout much of the episode, claiming that she was young and needed the money; Stan then tells him that the photos were taken a month ago, infuriating Cartman even more. As soon as the boys leave, Kenny comes back to life and emerges from the grave with his body sewn together, but an angel statue falls onto him, followed by an airline jet crashing into him, killing him once more. ==Production==