This is the last episode in which Mary Kay Bergman played a new character (Rebecca Cotswolds). It was also the last episode to air while she was alive.
The flag seen on Rebecca's door (when she and Kyle are playing doctor) is that of the Central-European country Slovenia.
When Ronnie James Dio was asked how he felt about the episode's parody of him, he said "I thought it was wonderful. I initially didn't want to let it be done because I felt that they were just going to crucify me [and] that I would end up being like what they did to Rod Stewart, and what they did to Elton John, and what they did to Ozzy. But they assured our office that they were real Dio fans and that I would like it. So I thought to myself "Well if you want to be an American icon, you better let them do it". And they did, and I was knocked out. It was funny. I thought they were more cruel to the drummer, if anything else."
In class, a drawing of a Visitor can be seen behind the students on the wall.
Rebecca Cotswald was based on Rebecca Sealfon who won the 1997 Scripps National Spelling Bee. She is one of the most well-known spelling bee winners, spelling her final word, "euonym," by screaming out each letter. She also displayed the odd habit of covering her mouth and whispering each letter before saying it, which was parodied in the episode as well.