At one point in the episode Marion says "Chuck sucks his thumb", referring to her son Chuck. This debunks the myth that Chuck was never mentioned again after his last appearance.
Georganne LaPiere, who play Richie's girlfriend Corinne, is the half-sister of Cher.
"Johnny Fish and the Fins" were played by rock'n'roll revival band "Flash Cadillac and the Continental Kids", who, in turn, played the band performing at the high school dance in the George Lucas classic "American Graffiti". Ron Howard who starred in "Happy Days", of course, also starred in "American Graffiti".
The song that Johnny Fish And The Fins perform is Young Blood by The Coasters.