Corey Price

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

As the Cohens prepare for Kirsten's 40th birthday party, Kirsten gets some news that will change her life forever.

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.

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

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 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.