Mrs. Weir hands Mr. Weir a vampire cape, telling him to "put this on". There's a little pause put in for SCTV Network (1981) fans to remember that Joe Flaherty - who plays Mr. Weir - was an original member of the "SCTV" troupe, and one of its most popular characters was Flaherty's "Count Floyd" from "Monster Chiller Horror Theater".
The real drink Martin Starr drank was a slim-fast milkshake with mini marshmallows and bits of cookies
In the first scene of the geeks trick or treating when Bill says what he's allergic to. Neal asks how can he possibly be allergic to nougat, the way he said it made John Francis Daley start laughing so hard the body part of his robot costume starts moving a bit.
According to the DVD commentary before the take of Millie kissing her boyfriend, James Franco asked Sarah Hagan if she "wanted to practice" with him before it was filmed.
This episode takes place from October 29 to October 31, 1980.