Happy Days: Fonzie substitutes for Roger in his hygiene class, and, as a prank, the students hide the lesson plan and tell Fonzie they're learning about sex. Roger is later informed that he will be fired as a teacher as a result of Fonzie's teachings.

Starring:

Al Molinaro, Anson Williams, Don Most, Erin Moran, Henry Winkler, Marion Ross, Ron Howard, Scott Baio, Tom Bosley

Genre:

Comedy, Family, Music