This is the first script written by Nell Scovell since the classic second season episode, One Fish, Two Fish, Blowfish, Blue Fish (1991).
Couch gag: Homer is Pac-Man and eats ghosts of Maggie, Bart, Lisa and Marge but dies when he tries to eat Flanders.
The Yale Unicycle Singers sing a song to Lisa to the tune of "Baby on Board", a hit song for the B-Sharps in S5E1 "Homer's Barbershop Quartet".
The compound Maggie is diagramming with tinker toys is diethyl 4-methyl benzyl phosphonate.
The billboard outside of the school features children in face masks waiting in line to see Santa, also in a face mask, with the caption, "Stay 6 feet from Santa for multiple reasons."