Cynthia Avila

The Cohen family prepares for a visit from Sandy's mother, Sophie (Linda Lavin - "Alice"), for Passover dinner. Fearing that his grandmother will not approve of Summer, Seth tries to keep the two from encountering each other--but Summer sets out to prove him wrong. Meanwhile, Ryan desperately searches for Marissa, who disappeared when she found out about Luke and Julie's affair.

The lives of a group of friends and families have been forever changed by the arrival of an outsider to their affluent oceanside community of Newport Beach in Orange County, California. When Ryan Atwood (series star Benjamin McKenzie) was taken in from the streets of Chino by then public defender Sandy Cohen (series star Peter Gallagher), the Cohens had no idea how Ryan's arrival would affect them and those around them. Initially resistant, Kirsten (series star Kelly Rowan) opened her heart to accept the outsider just as she had accepted Sandy, another outsider, into her old-money Newport Beach family. In Ryan, their "adorkable" son, Seth (series star Adam Brody), found a friend and brother with whom he could share his quirky way of looking at the world. Seth also struggles with the trials and tribulations of winning the heart of Summer Roberts (series star Rachel Bilson), his lifelong crush.

Sandy and Caleb confront Kirsten about her behavior. Ryan heads home to Chino, as he looks for the truth about Trey and Marissa. Meanwhile, Summer refuses to let her three-way relationship with Zach and Seth stop her from attending the prom.

Barnaby and J.R. look into the deaths of two brothers who were murdered just days apart. Their investigation leads them to believe that their deaths are somehow tied a local woman's return after being in a sanitarium for three years.