Caitlin Kazepis

Seth is determined to bring back the spirit and fun times of last year and won't stop until his plan is successful. Alex's jealousy is fueled when Marissa enlists an unlikely partner to help her with the school bonfire.

Eager to help Trey and Ryan repair their relationship, Marissa hosts a birthday party for Trey at Caleb's mansion that quickly gets out of control. After surfing with Carter, Sandy suggests introducing him to a woman friend, to Kirsten's chagrin.

When someone from Ryan's past comes for a visit, he worries that nothing good can come of it; while the Cohen family welcomes the Chino visitor with open arms. As Marissa and Ryan continue to explore their newfound friendship, Seth and Summer face some unforeseen news. Meanwhile, Julie admits her mistake to Kirsten and looks to Caleb for help.

Trey is the new Ryan. The Cohens rally around him to try to keep him from going back to jail.

When Sandy becomes the honorary chairman of the Newport Beach charity yard sale, he solicits help from Trey, who has his first confrontation with the Newpsies. While Sandy auctions off Newport's finest, Kirsten and Carter share a table.