Other mistake: When the show aired in 1990, in the pilot episode Brenda falls for Jason. She later on reveals herself to be a "16 year old junior" in high school. Season 2 opens up with the gang on summer break which technically would make them going into their senior year. It wasn't until Season 3 that they were going into their senior year. They graduated in 1993 from West Beverly but the show debuted in 1990 so technically they should have been sophomores.
Beverly Hills, 90210 (1990)
Episode list - season 1
More mistakes in Beverly Hills, 90210
Steve Sanders: Girls mature faster than guys.
Brandon Walsh: Not in my house they don't.
Trivia: James Eckhouse plays Jim Walsh, father of Brandon Walsh (Jason Priestley). In real life, Eckhouse is only 14 years older than Priestley.
Question: In the first few episodes, the Walshes live in a different house than the one they live in throughout the series. Nothing was ever even mentioned, I don't think. Was it a mistake, or did I miss the explanation?
Answer: There was no explanation. Usually, when a show doesn't know if it's going to be picked up or not, they will use stock footage until they can spend the money on a real location.
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