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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. See more...
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Continuity: In the episode "White Christmas" (Season 8, Episode 6), there is a blizzard on Christmas Eve dumping two feet of snow on Milwaukee. Mrs. Cunningham, LaurieBeth and Al are stuck at the Cunningham's house. Near the beginning of the episode, they show an exterior shot before they go inside the house. The driveway for the house is wet looking but totally clear of snow, with no one there to clean it, and it's still snowing. The hardware store has two feet of snow outside of it.
Continuity: In episode 136 (Marion, Fairy Godmother), Ralph is at Al's after everyone else has left on their dates. He's depressed and as he walks up to a table, you can see a couple of plates of food sitting on it. Then Fonzie comes in (hitting the wall to turn the lights on) and Ralph looks away from the table (he doesn't move otherwise). Then they show the table again - which is completely empty.






