The episode starts with Beavis and Butthead watching a horror film, when two kids trick-or-treating show up at their door. Mistaking them for handing out samples, Butt-head takes their candy and slams the door in their faces, and soon their father takes it back and beats them up, too. They decide to go out and trick-or-treat, but are dismissed twice for not wearing costumes. Beavis puts his underwear over his head and calls himself a nad. Butthead pours cheese all over himself and calls himself Nachos. They approach Anderson's house, who is about to dismiss them when his old friend calls, and he leaves his living room. Beavis and Butthead go inside, where Beavis eats all of the candy in the candy bowl, transforming into Cornholio. Anderson comes back and kicks them out, and when another trick-or-treater comes to Anderson's door, Anderson yells at him, mistaking the child for Beavis and Butthead. Beavis and Butthead then wander down the streets until Todd nearly hits and beats up Beavis. Todd then puts Butt-head in the trunk of his car and drive to the Country and drops him off on the Crazy Farmer's farm. Beavis, wandering around, eventually winds up at the Country, and meets the crazy farmer, who is digging a hole. Beavis is next shown hanging from a meat hook. Just then a zombified Butt-head and the crazy farmer walk in. They both pull out chainsaws and Slaughter Beavis.
While Cornholio (Beavis) is wandering around the graveyard searching for candy, a kid is dressed up as a Red Ranger from Mighty Morphin' Power Rangers (a cultural reference). The family gave up their candy and ran away.
The title is a parody of the film Halloween (1978)
This episode aired on actual Halloween.
Three days ago in the Beavis and Butt-head world was Beavis' birthday.
A scene where Beavis wears Stewart's Winger shirt and says "I'm a wuss" before singing Winger's "Seventeen" appears in airings but not on the VHS or DVD releases.