Episode 12 - Seth and Kirsten want to avoid facing the world after their respective displays at Thanksgiving. Sandy has some advice for Jimmy, which doesn't sit well with Julie. Ryan and Luke find themselves getting along after an O.C. loved-one comes out of the closet to face negative reactions

Episode 25 - Everyone is still reacting to the surprise engagement of Julie and Caleb. Kirsten is shocked, and a little burdened to find she's been asked to be Julie's Maid of Honour. Kirsten and Marissa end up in charge of throwing Julie's wedding shower, and Marissa invites an unwanted guest. Theresa calls Sandy for help and tries to avoid Ryan. Jimmy and Hailey continue their romance, and Seth awkwardly meets Summer's father.

Episode 26 - It's Bachelor and Bachelorette party time for Caleb and Julie. Caleb and the boys head off to Las Vegas while Kirsten organizes an evening at the Cohen house for Julie, strippers included. Seth and Ryan get themselves into a tricky situation in Vegas while back home, Summer pines over lost love, and Marissa comforts Theresa. Jimmy and Sandy learn of Caleb's true motives. Julie and Hailey take a swim, while Theresa has some shocking news for Ryan and Marissa.

Episode 15 - Hailey discovers she isn't as welcome as she might have thought. Perhaps the Cohen house is full? Luke makes some new friends, while Seth and Anna try to tell a friend about their decision. Rooney sings, a lot, and Oliver noses, a lot. Trouble brews.