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.

Ryan protects Seth twice. Penniless Jimmy has a hard choice.

After a hot girl seduces Ryan, Marissa has sex with Luke.

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.

Anna and Summer are mad at Seth. Julie has love problems.

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.

Seth's jealousy of Summer's new boyfriend gives him doubts.

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 Anna plans to move away, Seth tries to stop her.

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.

Julie has a wedding shower. Seth meets Summer's father.