The new episode title "What's Past Is Prologue" as Gia encourages Adrianna to audition for the lead singer in a new all-girl rock band and admits she has a crush on Adrianna who doesn't know how to respond to this news. Dixon's birthmother, Dana, shows up at the Wilsons for a surprise visit and tries to develop a relationship with her son. Silver and Teddy go on their first official date but Silver finds it difficult to deal with Teddy's playboy past and enlists Naomi's help to track his whereabouts. Find out what happen next on the all new episode of 90210 What's Past Is Prologue Season 2 Episode 15 full episode this Tuesday 8/7 c, March 23,2010 only at CW tv. This can be also watch full episode via online streaming on cwtv.com.