In "The Pandemic Special", Mr. Mackey holds a Zoom conference with the parents on allowing their children to return to school. Millard Anderson is one of the parents who appears on the call. He appears on the top left corner of Mr. Mackey's computer screen.
Millard has short curly black hair and wears a dark gray v-neck shirt with a green neckline, navy blue pants, and black shoes.
When him and his wife was seen at the South Park Elementary Cows Baseball game in "Child Abduction is Not Funny", he wore a blue v-neck shirt with a white neckline and the Cows logo on it.
In "Stanley's Cup" he was seen wearing his average v-neck shirt except the colors are swapped to have the gray as white as well as his green neckline being red with the capitalized name Detroit written on it. He also was one of many holding a red stick with "GO DETROIT" printed on it.
In "Christmas Snow" he was seen wearing a brown coat with white fur.
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- "It Hits the Fan" - Seen at the bar and later seen in Chef and The Boys's flight to Los Angeles and later seen in both the bar and the MSTV live audience at the same time.
- "Cripple Fight" - Seen at the bar and in church. He is later seen at the bar talking to Elise Garrett and in court.
- "Jared Has Aides" - Seen as one of Jared's supporters.
- "Super Best Friends" - Seen on the flight.
- "Terrance and Phillip: Behind the Blow"
- "Cartmanland" - Him and his family are seen waiting in line multiple times, however, they are not seen together.
- "The Simpsons Already Did It"
- "Free Hat" - Seen among the crowd of Free Hat supporters in the South Park Elementary Gymnasium.
- "Child Abduction is Not Funny" - Seen with his wife at the South Park Elementary Cows baseball game, And is later seen as one of many with his wife letting his son free with the other children of South Park after the parents were reported to be the ones responsible for Child abduction, He and his wife are later seen returning to his son at the end of the episode.
- "A Ladder to Heaven" - Seen among the crowd at the US ladder construction area.
- "The Death Camp of Tolerance" - Second Speaking Appearance; He is kicked out of the museum after being caught smoking, the parents insult him on his way out.
- "Red Sleigh Down" - Seen in the crowd in front of the City Hall and is seen asleep in front of the crowd during the 5th verse of Jimmy's song. He is however seen exiting the church during that.
- "I'm a Little Bit Country"
- "Fat Butt and Pancake Head"
- "Red Man's Greed"
- "Casa Bonita"
- "Stupid Spoiled Whore Video Playset" - Two of him are seen among the crowd at Paris Hilton's "Whore-off".
- "Mr. Garrison's Fancy New Vagina" - Seen in the stadium.
- "Wing" - Seen in the stadium.
- "The Losing Edge" - Seen in an audience.
- "Two Days Before the Day After Tomorrow"
- "Marjorine" - Seen at Butters' fake funeral.
- "Follow That Egg!" - Seen as one of many participating in the No Gay Marriage! campaign, one of his duplicates are also injured after being near one of the explosions, but seemed to be okay like the other victims.
- "Trapped in the Closet" - Seen in the crowd at the end of the episode.
- "The Return of Chef" - Seen at Chef's funeral.
- "Cartoon Wars Part I"
- "Cartoon Wars Part II"
- "Hell on Earth 2006" - Seen as one of many who appear in Hell when Satan announces his party and is later seen at the party wearing a priest costume.
- "Stanley's Cup" - Seen in the audience for the hockey game.
- "The Snuke"
- "More Crap" - Multiple versions of him are seen among the crowd at the EFSM Award Ceremony, with one seen next to Mr. Petuski being formal and the others appearing in his standard attire.
- "Britney's New Look" - Seen taking photos of Britney Spears along with many other people.
- "The Ring" - Seen at Kenny's funeral.
- "Pinewood Derby" - Seen among the residents at the end of the alien test.
- "Cartman Finds Love" - Seen in the audience of people awing over Cartman's song to Kyle.
- "Titties and Dragons"
- "PC Principal Final Justice"
- "Douche and Turd"
- "Handicar" - Seen among the crowd in Elon Musk's Tesla demonstration and later seen leaving Food 4 Little.
- "The Scoots"
- "Board Girls"
- "Christmas Snow" - Seen in the crowd of people infront of the stage and is later seen purchasing Randy Marsh's product.
- "The Pandemic Special" - Seen on Mr. Mackey's PTA Zoom call, his first name is revealed as "Millard" in this episode.
- "South ParQ Vaccination Special" - Seen leaving Food 4 Little.
- South Park: Post Covid: The Return of Covid - Millard is seen in the Pepsi Center when The Boys are taken there.