- "Rainforest Shmainforest" - She was in the Getting Gay with Kids choir.
- "Tweek vs. Craig" - She was seen in Home Ec.
- South Park: Bigger, Longer & Uncut - She is seen seeing the Terrance and Philip movie.
- "Chinpokomon" - Seen buying Chinpokomon.
- "Hooked on Monkey Fonics" - Seen at the dance.
- "Mr. Hankey's Christmas Classics" - Seen during one of the Christmas.
- "Something You Can Do with Your Finger" - She, along with Bebe, Annie Knitts, and Red act as groupies for Fingerbang's makeshift music video. She apparently goes crazy over Matt Lauer. In the video she "falls for" Kenny.
- "Trapper Keeper" - Seen walking in the background.
- "Fat Camp"
- "Scott Tenorman Must Die" - Seen as part of the crowd at Cartman and Scott Tenorman's public video viewings.
- "Terrance and Phillip: Behind the Blow"
- "Proper Condom Use" - She is seen shooting nails at the male fourth graders. She was later shown being carried into an ambulance.
- "Here Comes the Neighborhood" - Millie is seen with her family at the Zoo, telling her mother to "look at the little black lion".
- "Bebe's Boobs Destroy Society" - Millie is one of the girls gossiping about Bebe.
- "The Biggest Douche in the Universe" - Seen at the end being seduced by Kenny/Rob Schneider.
- "Grey Dawn" - Seen at the farmers market.
- "Casa Bonita" - Seen in the cafeteria.
- "Raisins" - Seen on the playground.
- "AWESOM-O" - Ask Butters on what AWESOM-O does.
- "The Jeffersons"
- "Stupid Spoiled Whore Video Playset" - Millie dressed like a whore along with the other girls, this is also one of the first times we hear her strong Southern accent.
- "Marjorine" - Seen in the crowd when Butters fakes his death, in the classroom, and at Heidi's sleepover.
- "Smug Alert!"- Seen at Cartman's party.
- "ManBearPig" - Seen in the auditorium.
- "Miss Teacher Bangs a Boy" - Seen in the hallway.
- "Le Petit Tourette"- Seen at Whistlin' Willy's.
- "Imaginationland" - Seen at Cartman's party.
- "The List" - Seen in the list-making meeting discussing who has the cutest purse.
- "Eek, A Penis!" - Seen in hallways; background only.
- "Super Fun Time" - Seen as Heidi Turner's partner during the field trip.
- "Breast Cancer Show Ever"
- "Elementary School Musical" - Millie says that Bridon Gueermo is "a dream".
- "The Ungroundable"- Seen in the background on the playground.
- "The Ring" - Seen at the Jonas Brothers concert.
- "Fatbeard" - Seen in the cafeteria.
- "Medicinal Fried Chicken" - Staring at Randy Marsh's big testicles.
- "Funnybot" - Seen in crowd scenes; background only.
- "T.M.I." - First one to notice and comment on the list about the boys' penis sizes.
- "1%"- Seen at the assembly and in the gymnasium.
- "The Poor Kid" Seen when Kenny McCormick returns to South Park Elementary.
- "Faith Hilling" - Seen in the memeing class with the other 4th Grade students.
- "Jewpacabra" - Seen at the Easter egg hunt.
- "Butterballs" - Seen in the background in the cafeteria.
- "Cartman Finds Love" - Seen in the background in the school cafeteria.
- "Insecurity" - Seen in the background in the school hallways.
- "Going Native" - Seen eating in the cafeteria.
- "A Scause For Applause" - Seen in the background in the school hallways.
- "Let Go, Let Gov" - Seen eating in the cafeteria.
- "Informative Murder Porn" - Seen in the community center when the kids were discussing how their parents were still watching murder porn.
- "Goth Kids 3: Dawn of the Posers"- Seen in the school gymnasium.
- "Taming Strange"
- "The Cissy" - Appears in Bebe's room with Bebe and Nelly while listening to Lorde's new song.
- "Grounded Vindaloop" - Appears briefly in the lunchroom.
- "Member Berries"- Seen at the school assembly.
- "Skank Hunt" - Conspires with the other girls to get back at the boys for Skankhunt42's wrongdoings.
- "Doubling Down" - Takes Heidi out to eat with the other girls. Teases her for her relationship with Cartman, although playfully, she unintentionally hurts Heidi's feelings.
- "The Problem with a Poo" - Seen in the school assembly.
- "Tegridy Farms" - Seen in the playground.
- "The Scoots" - Seen at Halloween Outlet.