sentences:  This episode marks the end of the first half of Season 11, which continued on October 3, 2007.The episode is rated TV-MA LV.It parodies various zombie movies, in particular George A. Romero's "Night of the Living Dead", "Dawn of the Dead" (including its remake), "Day of the Dead" and "Land of the Dead", plus "Return of the Living Dead" (the homeless repeatedly utter "change" instead of "brains").