The O.C. Season 1 Episode 24 The Proposal

Ryan and Theresa's relationship is tested as they prepare to make a big decision about their future. Meanwhile, Seth begins to question his feelings for Summer after spending more time with Anna. Kirsten and Sandy contemplate adoption and face some difficult decisions. Caleb and Julie's relationship becomes even more tumultuous, and Marissa continues to struggle with her feelings about her parents and her own identity. As the season comes to a close, tensions run high and secrets are revealed in the stunning season finale of The O.C.