High school is over. Time to move on. But events conspire to reunite Ryan, Seth, and Summer in posh, seaside Newport. And there may even be a new Core Four. After Taylor says a quick "au revoir" to France, she just might pursue Ryan until he catches her.
In the fourth season premiere, everyone struggles to adjust to life without Marissa.
Ryan travels to Mexico--with a stubborn Seth in tow--to put an end to his turmoil in the only way he knows how, but he comes up empty in quest for revenge.
It's Thanksgiving morning at the Cohen house, and the family is still dealing with what happened in Mexico.
When Summer tries to become the gossip-loving girl she once was, she realizes that Brown may have changed her forever.
Summer and Che (recurring guest star CHRIS PRATT) take their activism to a new level, resulting in more freedom than they expected.
When Seth visits Summer at Brown, he finds an empty dorm room.
It's time for another Chrismukkah in Orange County.
As the new year approaches, Ryan plans a special surprise road trip for Taylor and himself.
Newly engaged Seth and Summer both panic about the prospect of being married, but neither will break it off, despite the advice of their friends.
Taylor's ex-husband, Henri-Michel (HENRI LUBATTI), gets a little too close to home while promoting his erotic memoirs.
Che (recurring guest star CHRIS PRATT) and Seth take a trip to a forest, where Che has a dream and discovers that his spirit might be in love with someone unexpected.
As the Cohens prepare for Kirsten's 40th birthday party, Kirsten gets some news that will change her life forever.
As Valentine's Day approaches, Ryan worries that the pressure of the holiday will ruin his relationship with Taylor.
Taylor eagerly prepares for her first real birthday celebration, but she frets over the fact that Ryan has still not told her he loves her.
In the aftermath of a major earthquake that cuts off power and communication between the Cohens and their loved ones, Seth must take over Ryan's role as the protector when Ryan is injured and the boys are stranded on a deserted road.
In the emotional series finale of "The O.C.," Ryan, the Cohens, the Coopers and their friends build new lives, resolve lingering issues, face major decisions and undergo shocking personal transformations.