C'est la vie...

Jimmy and Sandy run into a roadblock in their effort to re-open the Balboa Lighthouse restaurant.

Nana Cohen comes to California for Passover with some sad news. Ryan searches for Marissa, who'd gone missing after learning Julie and Luke's secret, and he finds her in the most unlikely of places.

When Summer and Marissa run into Grady Bridges, the star of Summer's favourite prime-time soap 'The Valley', he invites them to an LA party, and they accept.

Anna announces that she is leaving Newport to go back to Pittsburgh, which leaves Seth feeling saddened and guilt-ridden.

Ryan and Marissa begin their life together as "friends", but both discover that it might be harder to do than to say.

It's Valentine's Day in Newport, and everyone is preparing for the Valentine's singles benefit. Luke has a new crush, while Sandy gives Seth some sex advice.

Changes are happening within the couplehoods of the O.C.ers. Lines seem to be blurred.

Sandy and Jimmy have plans to sign papers for the Lighthouse... but is Jimmy ready?

Oliver plans a trip for the gang, but things don't go as well as everyone might have hoped- except for Oliver of course.

Hailey discovers she isn't as welcome as she might have thought. Perhaps the Cohen house is full?