90210 (season 5)
On January 13, 2013, the President of The CW Mark Pedowitz stated that although "90210" doesn't have a season 6 renewal in place, the show would most likely be back next year (possibly for the final season if it were to be canceled) due to him being a "big believer in giving fans a very satisfactory conclusion" for long-running shows. In spite of this, in late February it was announced that the fifth season would indeed be the final season of the show, with the series finale airing May 13, 2013.On June 30, 2012, The CW released the first promotional ad for the fifth season. However, no new scenes featured in the 30 second ad, but rather recapped the final episode of season four. On August 23 at the 90210 launch party for season five, a new 30 second ad was released, showing brand new scenes of the upcoming season, including Justin Deeley's scenes. The CW then released another brand new promo for the fifth season on 11 of September, featuring more new scenes form the upcoming premiere, and brand new graphics for the shows promotional campaigns. On September 27, 2012, the cast and crew celebrated their 100th episode in Manhattan Beach, California.
90210 (season 1)
The producers wanted to see "as many of the original cast members as possible", but were careful not to "parade them all out in the pilot". Following rumors of cast members from "Beverly Hills, 90210" appearing on the spin-off, The CW confirmed that Shannen Doherty would be returning in a recurring role as her original character. Sachs met with Doherty over dinner, and told her about the "90210" spin-off. Over the next few weeks, they established Brenda's backstory and Doherty agreed to guest star in several episodes. Doherty and Garth told reporters that they were nervous about reuniting and filming scenes together for the "90210" spin-off. While starring in the original series, the actresses were known for feuding on and off the set, which lead to Doherty leaving the series in 1994. The pair had not spoken for years before filming their first scene together, and commented on the amount of buildup and nerves leading towards their first meeting. Doherty commented, "I think when you're 18, your personalities conflict, then you meet up 10 or 15 years later, and the playing ground is totally different and you're fine."