Episode 7 - The Newport kids plan an end-of-summer trip down to Tijuana, Mexico (aka "T.J."). Jimmy has plans of his own, which don't sit well with Marissa. Sandy gets a new job, which Kirsten can't understand. Summer, Seth, Ryan and Marissa find themselves in a strange place together. Jimmy takes it too far. Disaster strikes one of the O.C. kids.

Episode 3 - Sandy comes to Ryan's rescue once again, after he has a difficult stay in Juvenile Hall. Seth makes Kirsten aware of his anger over Ryan's situation, and Kirsten makes a compromise. Ryan's mother, Dawn, makes a surprise visit to Newport, and things don't go quite as she and Ryan may have planned. The monetary secret involving Julie, Jimmy, Kirsten and Sandy comes to a head.

Episode 9 - Back to school for the O.C. kids. No one really wants to be there, except for the gossips. Ryan doesn't feel like he fits in at his new school, and Luke doesn't make the situation any better. Sandy accepts a case at his new job, a case that will test his relationship with Kirsten and her father. Anna and Seth hatch a plan. Marissa chooses her man.

Episode 22 - 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. On the road trip to LA, Seth, Summer, Marissa, and Ryan run into Hailey, now working at a strip club. Jimmy and Sandy present their restaurant to Newport's finest and approach Caleb for some financial help.