The O.C. Episode 4.16 The End's Not Near, It's Here

Six months have passed since the last episode and everything has changed. The Cohens have taken temporary residence at the Coopers', while Julie has a wedding. Sandy and Kirsten's daughter Sophie Rose is born and the Cohens move back to Berkeley, California. Seth and Summer say goodbye, as do Ryan and Taylor. Years later, Julie graduates from college, and Seth and Summer get married, with Ryan standing in as the best man and Taylor as maid of honor. As the episode closes, Ryan, an architect, reaches out to a young boy, much in the same way Sandy reached out to him years ago.