When Jughead said he wishes Archie was still alive, following him, Moose, Reggie, Betty and Veronica entering the car with a photo of Archie on the side door; it's a reference to the "Life with Archie" Issue #36 where Archie was shot when he protected his friend from an assassin who wanted to kill the newly-elected senator and a campaigner for gay rights and gun control.
At the ending of the episode and during the credits, Lisa, Martin, Database and Milhouse play a version of the song Apple Core by Gerry Mulligan.
The British American football jingle is a reference Petula Clark's "Downtown".
This episode is one of the many that explain how Lisa got her pearl necklace, showing that Marge gave it to Lisa during her first day at school. However this is contradicted by many other episodes. For example, During Barthood, there's a scene that takes place after Lisa's first month at school, and she's not wearing her pearls yet. During Boy Meets Curl, Lisa mentions that her pearls were a gift by Marge when she could first read at the twelfth grade level, and during Lisa's First Word, baby Lisa is already wearing her pearl necklace.
During the Flashback, there's a picture of Lisa, Bart and Maggie on the wall, but it's likely that Maggie wasn't even born when the flashback takes place.