Corey Price

In the fourth season premiere, everyone struggles to adjust to life without Marissa.

Ryan travels to Mexico, with a stubborn Seth in tow, to put an end to his turmoil in the only way he knows how, but he comes up short in his quest for revenge.

When Summer tries to become the gossip-loving girl she once was, she realizes that Brown may have changed her forever.

When Seth visits Summer at Brown, he finds an empty dorm room. Meanwhile, Sandy and Kirsten take advantage of an opportunity to bond with Ryan, who is in a Taylor-induced haze.

Summer and Che take their activism to a new level, resulting in more freedom than they expected. Meanwhile, Julie flirts with a hot tennis instructor whom Kaitlin likes.

After Ryan and Taylor have an accident while hanging holiday lights, they realise that everything is not as it seems, and they must do whatever it takes to make things right again.