This is the first of two Halloween-themed episodes in the series. The second is the sixth-season episode "The Evil Eye."
Fonzie mentions that he had his tonsils taken out when he was a kid. However, in "Fonsillectomy," he has to have them out. It is, though, not uncommon for a person's tonsils to grow back.
Howard: One of the trick-or-treaters tonight had this cute little joke: What do you get when you take out the inside of a hot dog? A hollow weenie.
Joanie: (after Richie rushes out of the Simpson house) You really look scared, Richie.
Richie: I am not. Don't be ridiculous. I just want to get home. I'm hungry.
Joanie: You'll have a hard time eating with your heart in your throat, Richie.
Richie: Ha, ha, ha.
Joanie: I'm not going in there. Everyone knows about old Magnolia Simpson. Ever since she lost her head, anybody else who goes in gets their's chopped off too.
Richie: Now where'd you hear that?
Joanie: Phyllis Boyer. She told me about the four people who went in there last Halloween, and they never, ever came out.
Richie: They just disappeared, right?
Joanie: Just their heads.
Richie: Well if something like that were to happen, it would've been in all the newspapers.
Joanie: Phyllis said that the ghost warned reporters not to write about it.
Fonzie: You can't lie to the Fonz, not even my mother. She told me, when I was having my tonsils out, that I was going to a parade. But I broke her down. She confessed on the way to the hospital.
Fonzie: You got nothing to fear but fear itself.
Richie: Didn't somebody else say that?
Fonz: Well, if they did, they got it from the Fonz.
A scene from this episode is seen in the movie Ocean's Twelve.
Scott Marshall is credited as "Scotti Marshall."
Kathleen Marshall is credited as "Kathi Marshall."