Ryan, Marissa, Seth, and Summer try to raise money for Johnny's knee surgery by throwing Ryan a Bar Mitzvah as part of Seth annual Chrismukkah celebration. Ryan is glad t ...

Marissa cares for an injured Johnny. But could they be getting too close? Ryan and Matt pull an all-nighter to prepare for a big meeting, but their night takes a turn. Se ...

It's time to start college applications: Ryan can't decide where he wants to go, Sandy is pushing his alma mater on Seth, and Summer is worried about being on the opposit ...

Charlotte and Julie throw a faux-benefit with an unknowing Kirsten. Taylor's meddling causes a rift between Seth and Summer. Sandy struggles with his new responsibilities ...

Taylor plans a Saturday night lock-in for the senior class, but not everyone is game. Seth helps Taylor in a time of need, but his kind gesture may have ramifications for ...

Summer decides to bring the curtain down on a certain student-teacher affair, and gets help from Seth and Sandy. Ryan has a personal crisis after overhearing devastating ...

Marissa struggles with attending new public high school Newport Union, and her new friends, Johnny; his girlfriend Cassey; and their nerd friend Chili, all of whom make R ...

After Caleb's will is read which reveals that he's lost everything, Jimmy must make a difficult decision whether or not to stay in town or move away again to avoid his bu ...

As the gang returns to school for their senior year, Jack Hess, the new dean of discipline of Harbor High School, wants to expel both Ryan and Marissa for the shooting in ...

Ryan and Marissa deal with the aftermath of Trey's shooting when Julie maliciously goes to great efforts to protect her daughter by influencing Trey to charge Ryan for th ...

Kirsten hits rock bottom after Caleb's funeral, prompting Sandy to finally take action by staging an intervention. Meanwhile, Jimmy Cooper returns to Newport and almost i ...

Seth and Zach squabble over who should take Summer to the prom and who will meet George Lucas for dinner over the publishing of the graphic novel. Meanwhile, Sandy takes ...

Seth and Zach declare war when they compete against each other for Summer's affections. Meanwhile, Marissa is still reeling from being nearly raped by Trey, and refuses t ...

Sandy, Seth and Ryan travel to Miami, Florida to visit Sandy's mother, the Nana, after she tells Sandy she is getting married to a much younger man. Back in Newport, Kirs ...

Sandy, Ryan, and Seth devise a plan to save Trey from going to jail after he took the fall for supplying drugs at his birthday party. Kirsten and Carter, fulfilling more ...

On Trey's 21st birthday, Marissa, anxious to help Trey and Ryan forge a relationship, throws a birthday party for Trey at the Cooper-Nichol mansion that turns out to be a ...

Sandy reluctantly agrees with Kirsten to serve as host/auctioneer at yet another OC benefit. Meanwhile, Trey lies to Ryan to prove that he can be self-dependent when he s ...

When Ryan's brother, Trey, gets out of jail and gives Ryan a call, the Cohens give him a warm welcome. Though, Ryan knows nothing good can come from it. Zach returns from ...

Marissa recruits Ryan to help her with Harbor School's Pep Rally Bonfire. Alex accepts that her and Marissa are from two different lives and knows she is fighting a lost ...

The gang get the chance to have a few heart-to-hearts when they're accidentally locked in a mall for the night. Marissa and Summer catch up about the state of their curre ...

During a rainy day in Newport, Lindsay decides to take the DNA test and makes a difficult choice regarding her life with Caleb while Ryan helps her through it. Elsewhere, ...

As Sandy continues working on Rebecca's case, Kirsten questions how strong their feelings are for one another. Meanwhile, Seth continues his downward spiral in the afterm ...

On Valentine's Day, Sandy and Kirsten's conflict about Rebecca continues. Ryan tries to make peace with Caleb in order to spend Valentines Day with Lindsay. Meanwhile, Se ...

After hearing about Lindsay and Ryan's failed attempt at dinner with Caleb the night before, Kirsten arranges a dinner that she can supervise. But her presence makes no d ...

Hostilties heat up between Sandy and Kirsten when Sandy decides to help Max Bloom, his mentor in law school, find his daughter, Rebecca, whom was Sandy's first love. Mean ...

Alex's ex is in town, which makes Seth paranoid. A discovery makes him even more so. Meanwhile, Marissa, Summer, and Lindsay have a girls' night out, while Ryan, Seth, an ...

Sandy forgets his 20th wedding anniversary, creating tension with Kirsten. Not even a romantic getaway will fix this one. Sandy's chance for redemption is impaired when t ...

Time to move on: Jimmy decides to relocate to Maui. Time to make a choice: Ryan and Lindsay wonder about their relationship status, given recent revelations. Time to bust ...

Seth plans yet another Chrismukkah. This time, Ryan has drama with the ladies. If Marissa comes by, then his new interest Lindsay can't come. If Lindsay comes by Marisa c ...

Summer's relationship with Seth strains her relationship with Zach. Ryan asks Lindsay to go to the SnO.C. dance. Meanwhile, Julie finds out about Marissa and D.J.'s relat ...

Wanting to move on with their lives, Ryan sets Seth up with Lindsay. Seth sets Ryan up with Alex (Alexandra) Kelly, the punk rock teenage manger of the Bait Shop. But dur ...

Caleb spends the night in jail until Sandy bails him out, and all of Orange Country finds out about his troubles via a front page newspaper spread. Seth realizes that he ...