Corey Price

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

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.

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.

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.

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