The first season of 90210, an American television series, began on September 2, 2008. Gabe Sachs and Jeff Judah are executive producers for the first season, after original producer Rob Thomas dropped out to focus on other projects. The series premiered to 4.65 million viewers, and broke records for The CW at the time, becoming their highest rated premiere in viewers and in Adults 18 -- 49 with a 2.6 rating. On September 22, 2008, after airing just four episodes, the network gave the series a full - season order of 24 episodes.
how many episodes are in 90210 season 1
24