Treehouse of Horror XX/References


 * The first segment is a pastiche of numerous Alfred Hitchcock films. The main plot derives from Strangers on a Train, where two men plot to kill off each others' enemies, while other elements of North By Northwest, Vertigo and other Hitchcock movies are included. Hitchcock himself is shown in a brief cameo stepping out of a bus (as he did in the title sequence of North By Northwest).
 * The second segment is a parody of both 28 Days Later and Children of Man, in that a plague of pseudo zombies are ravaging the world, and that a child holds the key to mankind's salvation and must be protected at all costs. It could also be a slight parody of the horror-comedy movie Zombieland, since both epidemics started via a contaminated burger.
 * The third segment does not completely parody any existing work, but instead seems to be a diegetic play staged by Marge, Moe and Homer for the consumption fo the denizens of Springfield.