When Debbie (Lori Loughlin), Harry (Rob Estes), Annie (Shenae Grimes), Dixon (Tristan Wilds) and Sean (guest star Josh Henderson) spend the evening playing games, Annie overhears a phone call with Sean that raises suspicion. Adrianna (Jessica Lowndes) invites Brenda (Shannen Doherty) to attend a support day at her rehab center, but the day quickly turns upside down when Adrianna learns information that will cause her life to change forever. Brenda and Kelly (Jennie Garth) stand by Adrianna's side and Brenda reveals a secret she has been hiding from Kelly. Dixon and Christina's (guest star Lauren London) friendship continues to grow when she invites him over to her house, an invitation he hides from Silver (Jessica Stroup).