The Cunninghams watch The Untouchables, a series that began airing in 1959. This episode, however, takes place in 1955.
Sergeant: Aw, Fonzie. I'm ashamed of you. I never expected to see you in here for draggin' - especially against Skizzy. Now, don't tell me you lost your cool.
Fonzie: Hey, he insulted a friend. I just thought it was my duty to drive, you know?
Sergeant: Well, I guess chivalry ain't what it used to be.
Sergeant: (speaking to kids rounded up at an illegal drag race and Howard, who tried to stop it) Ah, it's the children's hour. Now, this isn't a nice way to spend the evening, is it? We could all be home, in our nice little beds, but you had to go out and have a nasty, old drag race. Now, in case you haven't heard lately, drag racing is a no-no in this state. (speaking directly to Howard) Ah. You don't make me very happy, kids. (taps Howard on shoulder) You're a little old for this kinda thing, aren't you, sonny?
Chuck says he's going back to the dorm after beating Richie in basketball.
There is a mention of the car from "The Lemon" in this episode.
The title is a reference to the 1967 motion picture, Guess Who's Coming to Dinner.