A teacher assigns Daria to work with Beavis and Butt-head on a science project, but clever Daria makes Beavis and Butt-head the subject of the experiment.
Beavis steals Mr. Anderson's credit card, and the boys take it to a pet store where they purchase some furry and feathered new friends. Meanwhile, Mr. Anderson tries to check into his hotel while on a trip to the Oddfellows Convention, but soon finds he has no way to pay for his room.
While working at Burger World, Beavis and Butt-head fry up some unsavory items, take turns dipping their fingers into the hot oil, and 'borrow' a little money from the cash register. Mr. Anderson is completely unsatisfied with their service.
Mr. Buzzcut assigns the students to pair up and take care of a 'sugar baby' to give them a taste of parenthood. Since no girl wants to partner up with either Beavis or Butt-head, they pair up together, slap their 'baby' around, and give it a bath in a stream.
Beavis and Butt-head go to see a drive-in movie. They cause mischief in the snack bar, then harass a couple having sex in their van. Butt-head angers the woman inside, and she's out for revenge.
Beavis and Butt-head visit a carnival in hopes of seeing the sideshow freaks, and catch Tiffany The Rubber Band Lady's double-jointed performance. Due to a little misunderstanding, the carnies soon have them working as the 'Chicken-Head-Biting, Siamese-Twin Geeks.'
Beavis and Butt-head spend a day working at Burger World. They play with the deep fat fryer, take orders at the drive-through window, and try to help customers at the front counter.
Beavis and Butt-head want to 'feel good', so they go to the doctor to get prescriptions for alcohol-laced cold remedies that will make them high. They're embarrassed to be mostly naked in front of the lady doctor, who denies them a prescription for cold medicine and gives them a different treatment altogether.
Mr. Anderson hires Beavis and Butt-head to paint his house. Of course, they end up sniffing the paint thinner, and while under its influence, don't exactly do the best job. Mr. Anderson has to give their descriptions to the police.
Beavis and Butt-head decide to hitchhike down to Mexico so they can purchase illegal fireworks, but find themselves used as drug-smuggling mules on the way home.
Beavis and Butt-head are the presenters for 'Best Metal Hard Rock Video.' Beavis burns the award with his lighter.
Beavis and Butt-head hang out at the drive-in theater, where they cause trouble with explosives in the bathroom, raid the snack counter, and anger a security guard with an itchy trigger finger.
Beavis and Butt-head get laugh attacks in class. Principal McVicker threatens to expel them or send them to a dangerous alternative school if they continue laughing in class. Of course, since they're headed off to Mr. Buzzcut's sex education lecture, trying not to laugh will be difficult.
In the Summer of 1993, this television commercial compared the original Moronathon to Woodstock, and similar summer music festivals.
While working at Burger World, Butt-head dozes off and has a dream that he and Beavis are rock stars, playing in front of a huge crowd. Strangely, they have no actual instruments, but the crowd doesn't seem to mind.
Mr. Anderson hires Beavis and Butt-head to prune his trees, but of course they nearly destroy his property when they find 'pruning' is easier with a chainsaw.
Beavis and Butt-head use Stewart for his pay-per-view television, wanting to watch 'Death Truck' over at his house. Of course, nothing good can come of this, as they quickly get bored with the program and begin to find other ways to amuse themselves in Stewart's home.
Mr. Van Driessen is teaching his class about the ancient art of Japanese haiku - spare, haunting poems. The boys orally compose their poems for the class, as Van Driessen writes them on the board. A guidance counselor doubts Van Driessen's recommendation that the boys consider poetry as a career.
Beavis and Butt-head do community service work at the local hospital. Among other mischief, they steal a golf cart from obese heart patient Billy Bob, and create a higher level of stress in his life than any obese heart patient should have.
Beavis and Butt-head see some female mud wrestling on TV, and attempt to stage their own version in the front yard. When they think they're ready to compete, they head to 'Babes-R-Us', a local female mud-wresting bar. But first, they have to get past the bouncer.
While watching TV, Beavis and Butt-head see a very erotic and sexy commercial with a hot girl licking frozen yogurt. They head out to the yogurt shop to buy some, only it doesn't taste quite how they expected.
Beavis and Butt-head see a commercial for a skeet shooting range on TV, and decide to try it out. Butt-head's aim isn't very accurate, but he does manage to shoot down something special.
Beavis and Butt-head think if they do chores for Mr. Anderson, he might put them in his will. He tells them to wash his pet poodle, Colette, but instead of giving her a traditional bath, they take her to the laundromat and wash her in a very unconventional way.
It's Friday Night, so Beavis and Butt-head loiter at Maxi-Mart looking for chicks and causing trouble. They meet a hot biker babe who finds a use for them.
Beavis and Butt-Head are loitering outside the local army recruitment office, where they meet Sergeant Richard 'Dick' Leaky - also known as 'The Rooster.' He shows them some recruitment videos and lets them touch his MX35 grenade launcher to persuade them to consider the Army as a career.