Television sitcom set in the 1950s, originally based on an episode of Love American Style which was entitled "Love And The Happy Day" and starred Ron Howard and Anson Williams. (Similarities to the movie American Grafitti have also been noted.) The pair starred as Richie Cunningham and Potsie Weber on the new series, which also starred Donny Most as Ralph Malph and Henry Winkler as Arthur Fonzarelli, aka Fonzie or "the Fonz". Depicted the wacky misadventures of a group of teenagers who hang out at a hamburger joint called Arnold's. Happy Days was one of the shows that made the ABC network the undisputed ruler of prime time for a few years.