The O.C.

Tough teen Ryan moves in with the Cohens in Orange County.

The teens hide in a model home, but a bully causes trouble.

Kirsten takes temporary custody of Ryan. His mom gets drunk.

The teens attend cotillion, where a fight breaks out.

After befriending a likeable busboy, Donnie (PAUL WASILEWSKI), at a casual seafood restaurant, Ryan takes a job there.

Kirsten nervously prepares a magnificent birthday party for her widowed father, Caleb Nichol (recurring guest star ALAN DALE), an extremely successful and driven businessman for whom Kirsten works.

In Tijuana, Marissa learns about the divorce and overdoses.

Ryan risks his future to keep Marissa from being sent away.

Summer is secretly jealous of Seth's relationship with Anna.

Marissa and Ryan date. Summer denies her feelings for Seth.

Seth gets in trouble choosing between Summer and Anna.

After Thanksgiving, Anna (recurring guest star SAMAIRE ARMSTRONG) and Summer (recurring guest star RACHEL BILSON) remain upset with Seth for his behavior on the holiday, and Seth struggles to reconcile with them.

The Cohens celebrate Chrismukkah. Seth juggles two girls.

Kirsten's unruly sister hosts a huge New Year's Eve party.

Disruptive Hailey refuses to leave. Seth chooses Anna.

When Oliver almost overdoses, Marissa stays with him.

Sandy and Jimmy begin a new business partnership when they buy The Lighthouse, a beloved Newport restaurant.

Ryan and Luke ally to protect Marissa from Oliver.

Marissa tries to reconcile with Ryan, but he can't forgive her.

Marissa and Ryan try to start over as friends.

When Theresa (recurring guest star NAVI RAWAT) decides to stay in Newport, Ryan is glad, but he feels obligated to help her find a job and a place to live.

When actor Grady Bridges invites Summer and Marissa to his birthday party, the girls take Ryan and Seth to Los Angeles to join in the festivities. At the party, Summer is thrilled to spend time with Grady, but Seth is not as happy.

Seth fears his grandmother will disapprove of Summer.

Marissa is mad at Julie and Luke. Caleb proposes to Julie.

Every bride-to-be must have a wedding shower, and Julie is going to have one to remember, thanks to Marissa.