This is the final season before “Happy Days” would coin the term “jumping the shark,” when Fonzie literally jumped over a shark on water skis. The term has since gone onto signify when a show has run its course and starts resorting to far-fetched plot gimmicks to keep it going. But Ron Howard’s very popular sitcom about idealized 1950s life was still going strong in this season.

Grade: B

Happy Days – The Fourth Season is currently available.