Several references are made to Fonzie playing Hamlet. This occurred in the season-two episode "A Star Is Bored."
When Richie is reading his review at the Cunningham house, in the last scene, Chachi spills a bag of chips on the floor. They cut to Richie while he reads his review, and, when they cut back to Chachi, the chips are gone.
Terence McGovern is credited as "Terry McGovern."