90210 Season 2 Episode 22 (90210 s02e22) with title “Confessions” airs on Tuesday, May 18th 2010 at 08:00 pm via The CW.
Here is summary for 90210 Season 2 Finale :

Teddy seeks revenge after learning that Spence tried to bribe Silver; Liam and Annie share their darkest secrets. Meanwhile, Ryan receives a mysterious package.

Few hours after original series aired on TV, online streaming video for 90210 Season 2 Episode 22 usually available on Net and of course, if video available, as soon as possible lenidenews.com will show you where you can watch this episode for free.