At the end of last season, Ryan returned to Chino to protect his pregnant ex-girlfriend from her abusive ex-boyfriend and, with the departure of his only friend in Newport Beach, Seth decided to do what he always had planned: sail off on his yacht, the Summer Breeze, and run away from Newport Beach. With Seth and Ryan gone, Kirsten and Sandy try to stay busy with a remodeling project at home, while Julie and Caleb settle into their gorgeous Newport Beach mansion. But now the summer is over, school's about to begin and Ryan and Seth are nowhere to be found.
Come home, Seth! If Sandy can't persuade his alienated son to return to the family perhaps Ryan can. Meanwhile, Theresa realizers her relationship with Ryan is on life support. Time to pull the plug?
The boys are back. Every status is quo. Except: Summer won't kiss and make up, Ryan catches Marissa in a clinch, the DA busts Caleb, Hailey bails and the remodellers are like a wrecking crew. Home sweet chaos.
Seth pulls off a magnanimous gesture for Summer, then blows it. Lindsay and Ryan become physics lab partners and share some romantic chemistry. Embattled Caleb names Julie as Newport Group's CE-uh-O.
It's not a date, it's a group hang. So Seth goes with Lindsay, but looks for Summer. Ryan goes with Alex, but would rather be with Lindsay. And Julie... well, stay tuned. That new CEO has a style of her own.
The winter dance is near and a Ryan-Lindsay hook-up is off, on, off, on, off like a light switch. But all will be smoothed over by the time of the big Newport social event. Or not. Plus: Caleb's secret - revealed!
Friends, festivities, 8 days of gifts, another day with a whole lot of gifts. Seth's formula for the perfect Chrismukkah may come undone when Caleb's confession rocks the Cohen world.
Time to move on: Jimmy decides to relocate to Maui. Time to make a move: Ryan and Lindsay wonder about a first kiss. Time to bust a move: Seth turns bad boy in an attempt to impress Alex.
Sandy didn't forget his 20th anniversary. Honest. Just ask him. And just watch him squirm as he tries to make things right. Also, Seth and Ryan are grounded; DJ calls it quits with Marissa.
The ABC's of Love. When Alex wants to spend time with her ex, Seth says "X" must make room for "I" and "U." But there's something Seth doesn't know. Julie has a makeover idea for the Newport Group.
Ryan tries to smooth things over between Caleb and Lindsay, Alex and Marissa grow closer, Seth uses his life as inspiration for a comic book and Kirsten is uneasy when Sandy is asked to help find his ex-fiancee.
Try try again. A cardiac crisis gives Caleb a new outlook. Seth and Summer struggle to deny their attraction. And if, as Sandy says, Rebecca is dead, why does Kirsten find her in Sandy's office? Uh-oh.
Happy Valentine's Day! Seth's feelings for Summer destroy their comic-book pitch meeting, Ryan turns pool-table hustler in hopes of winning approval for his romance with Lindsay, and Kirsten distrusts Sandy.
Did they or didn't they? Seth can't stop thinking about Summer's and Zach's stay in San Diego. Will he or won't he? Julie plants doubts that could derail Caleb's decision to adopt Lindsay.
Rain - and it seems there are as many problems as raindrops. Kirsten, Sandy...and Rebecca. Julie, Marissa...and Alex. Lindsay, Ryan...and Chicago. Summer, Seth...and Italy. Can't rain forever, can it?
The Seth/Summer plan to help Ryan shake his Lindsay blues is...a mall visit? Hey, it can work. Because Marissa comes along. And everyone gets locked inside the place. An extortionist targets Julie.
$500,000 is still the going rate to keep Julie's porn past off the net. Meanwhile, Seth plays matchmaker, suggesting that Ryan help Marissa plan the school's spring bonfire. Someone's gonna get burned.
T is for trouble. And for Trey, Ryan's brother, who's out of prison and trying to go straight while staying temporarily in the pool house. The tape no one was supposed to see is seen by all of Newport.
A yard sale sans yard - aka The Oc Charity Yard Sale! But it does offer many items, including the crystal egg from Risky Business. But wait...the egg is missing, and Ryan and Seth must scramble to get it back!
Marissa throws a birthday party for Trey - an event that may or may not smooth things between the two Atwood brothers. Julie gets cozy with Lance, her long-ago lover and recent extortionist.
The evidence adds up. Trey is likely to do time for drug violations. But Sandy, Ryan and Marissa know he's innocent and develop a plan to catch the real culprit in the act. Seth meets a marketing...genius.
Nana's getting married - news that has Sandy, Seth and Ryan off to Miami. Back at the OC, Zach wows Summer with a home-cooked meal, Kirsten sorts out her Carter feelings and Trey's feelings for Marissa take a terrifying turn.
Dynamite with a lit fuse: Kirsten goes on a bender now that Carter's gone, Ryan can't figure what's up with Marissa, Caleb hits Julie with divorce papers, and the Seth-Zach rivalry turns into War of the Weirds.
Heads: Seth takes Summer to the prom. Tails: Zach does. Whoever's dateless takes a meeting with George Lucas to discuss Atomic County. That'll settle things, right? The Julie-Caleb union ends...not the way anyone expected.
Familiar faces show up for a final farewell to Caleb. Meanwhile, Sandy takes action to help Kirsten. And when Ryan learns about the Trey-Marissa incident, a showdown - if not a tragedy - is inevitable.