The sets for the inside of the Malph house were from the house in the soon-to-be-canceled The Brady Bunch, another ABC show. The basement was actually the Bradys' bedroom (minus the frosted glass divider), and the room in which the parents were playing bridge was the Bradys' living room.
Gas spills down the side of the car as Richie pours it in the tank.
In this episode, Ralph's parents are named Harry and Hazel. In later episodes, they are Mickey and Minnie.
Potsie: What's the world coming to when you can't bribe your best friend?
Howard: What are you going to wear to Ralph's costume party?
Richie: I haven't decided yet.
Marion: How about something like Donald Duck?
Richie: Oh, Mom!
Marion: What's wrong with Donald Duck?
Joanie: Mom, it's hard to neck with a beak.
Though not credited, Eileen Koch played the part of Fonzie's date.
This is the first episode that features Ralph's parents, Harry and Hazel Malph.