Trivia: In many episodes you can see a pennant near the jukebox that reads Stacey vertically. That's in homage to Henry Winkler's wife, Stacey Weitzman.
Trivia: Richie and Joanie had an older brother named Chuck, who was played by two different actors, and who only appeared during the first season of the show, because the character of Chuck was written off the show. This plot plot has since absorbed into popular culture: known as "Chuck Cunningham Syndrome," it refers to a character's (either leading or supporting) unexplained disappearance from a series.
Trivia: The Motorcycle that Fonzie rides in the series is the exact same model as Steve McQueen used in the film "The Great Escape" (1963).
Trivia: Henry Winkler (Fonzie), Marion Ross (Marion Cunningham), and Tom Bosley (Howard Cunningham) are the only actors to appear in all 255 episodes of the show.
Trivia: In Season 5, in the 3 part special (episodes 89-91) the whole gang heads to Hollywood. It is here that Fonzie jumps over a caged shark on water skiis. Today a TV show is said to have "jumped the shark" when it has passed its peak and fans feel a significant drop in quality. The phrase was popularized by the website www.jumptheshark.com.
Trivia: There is an excellent pop video that honours Happy Days. It is by the band Weezer. The song is "Just Like Buddy Holly," and features the band performing it in the cafe. Most of the cast also turn up in it by the wonders of camera trickery.
Trivia: The Cunningham house shown from the exterior is in reality, only within a mile of the studio where the interior sets of the house were filmed.
Trivia: Fonzie's full name is Arthur Herbert Fonzarelli.
Answer: When it was originally broadcast there was a different ending. A new ending was added when the show was rerun to set up the Mork and Mindy series.