Dennis (voiced by Gideon Evans) is an alcoholic who addresses Coach Buzzcut's class on the dangers of alcohol abuse ("Dumbasses Anonymous"). He tells the class that he lost his home, his family and his business due to his drinking. B&B decide to visit Rolling Hills, the drug and alcohol treatment facility where Dennis attends counseling sessions, hoping that the people there can help them to get beer. After B&B tell the receptionist that they have had trouble getting beer, she places them in Dr. Steve's support group for alcoholics. B&B describe beer in increasingly appealing terms (obviously lifted from commercial advertising) until the entire group walks out of the session to go to a bar down the street.
In "Garage Band" an unnamed character of identical appearance and voice is the manager of a motel looking for a lounge band. B&B watch a program in which a rock musician talks about playing in a garage, which gives them the idea to start a band. They see a sign at a local motel saying "Band Wanted". They tell the manager that they are a band. He hires them, and he tells them that Metallica (which Beavis gives him as the name of their band) "has a nice ring to it." B&B fail to show up after a disagreement over whose name should be listed first, while the motel manager is left to deal with a large, unruly crowd who have shown up expecting to see Metallica. The sign outside advertises "Metallica, Featuring Beavis and Nut-head".
Protagonists: Beavis / Cornholio / Old · Butt-Head / Old
Recurring Characters: Tom Anderson · Stewart Stevenson · Todd · Burger World Manager (2022) · Mrs. Stevenson · Mr. Stevenson · Lolita and Tanqueray · Maxi-Mart Clerk
Highland High School: David Van Driessen · Daria Morgendorffer · Principal McVicker · Coach Buzzcut · Spanish Teacher · Ms. Tress · School Nurse · Kimberly · Cassandra · Earl · Martin (thin) · Mrs. Dickey · Gina · Dreama · Dean Zunker · Punk Girl · Wilbur · Martin (gifted student) · JD · Glennis · Cody · Audrey · Mrs. Ortiz · Security Guard · Gym Teacher · Tommy · "Spare Me" Girls · Amy Asskowitz · Audrey's Friend · Dick Gaylord · School Psychologist · Ms. Jenkins · Jim the Substitute · Woodshop Teacher · Ryan · Librarian · Unnamed Female Teacher (Citizen Butt-Head)
Minor Characters: Marcie Anderson · Clark Cobb · Dave · Harry Sachz · Homeless Man · Madame Blavatsky · Redneck Lady · Crazy Farmer · Billy Bob · Slade · Psycho · Principal Brown · President Bill Clinton · Concert Girls · Hamid · Sterculius, the Roman God of Feces · St. Peter · Unnamed Police Officers · Mr. Manners · Frog · Harry Buddisker · Hiro · Mistress Cora Anthrax · Biker Lady · Fork Injury Guy · Peter Small · Killer · Second Killer · Ross and Harlan · Ellen · Keith · Case Worker · Rabid Ron · Lydia · Katya · Hairdresser · McVicker's Family · Beavis' Imaginary Children · Butt-Head's Imaginary Children · Gus Baker · Leroy · Fire · Jesus Christ · Ganesha · Buddha · Zeus · Bill Gates · Bill (Steamroller) · Linda · Joan · Mall Girls · Elevator Chick · Joe Adler · Suspicious Chick · Maya Kanigher · Megan · Old Woman (Couch-Fishing) · Cop (Couch-Fishing) · Cop (Pipe of Doom) · Cop (Screamers) · Mechanic · Slob · Priest · Rabbi · Jasmine · Captain Dick Jackman · Charlie the Angel · Misty Lou · Lucas · Dennis · Female Judge · Screaming Guy · Black Female Cop · Corvair Owner · Jim Baxley · Snake Woman · Urologist · Dr. Fisk · Dr. Leibowitz · Vet Receptionist · Wrong Mr. Anderson · Crystal · Sapphire · Gary · Shawna · Suspicious Chick · Debra Shea · Trish Burbee · Tiffany the Rubber Band Lady · Max Graham · Veterinarian · Victoria's Dad · Ric Aaron Joseph · Receptionist (Pumping Iron)
Movie Characters: Muddy Grimes · Dallas Grimes · ATF Agent Bork · ATF Agent Flemming · FBI Agent Hurly · Old Woman · Motley Crue Roadies · Judge · Serena Ryan · Jim Hartson · Mattison · Empress Beavis · Emperor Butt-Head
Smart Characters: Smart Beavis · Smart Butt-Head · Smart Daria · Smart McVicker · Smart Buzzcut · Smart Van Driessen · Smart Todd · Smart Judge · Smart Mrs. Stevenson
Mentioned Characters: Shirley Beavis · Tom Anderson's Son · Tom Anderson's Father