One Tree Hill

Brooke and Julian navigate the challenges of parenthood with their new children, while Haley and Nathan face similar struggles in their own family life. Unbeknownst to them, returning figures from their past may disrupt their future plans. At the same time, Clay and Quinn confront an enigmatic issue of their own.

Brooke discusses a potential business opportunity with her father, while Julian grows concerned about his financial stake. Quinn encourages Clay to seek support for his issues, and Millie attempts to be truthful with Mouth. Meanwhile, Alex is presented with an appealing but uncertain offer.

Dan supports Haley during a difficult time at Karen's Café. Quinn begins to suspect that Clay is keeping secrets, while Chase attempts to recover from a recent heartbreak. Brooke is disappointed when her lunch plans with her father fall through, and Julian faces the consequences of a significant error in judgment.

Julian grapples with feelings of guilt while Brooke supports Haley in facing competition from a new, challenging cafe. At the same time, Chase's new romantic interest harbors a complex secret, and Quinn's drastic actions lead Clay to a sobering realization about his own situation.

Quinn distracts Jamie while Haley looks for Nathan. Clay receives answers regarding his condition. Julian tries to return to normal life, and Brooke gives Tara another chance.

Dan asks Julian for help finding Nathan while Mouth informs Clay about Nathan's situation and Haley explains his disappearance to Jamie. Brooke comes up with a plan to attract customers to Karen's struggling café, and Chris Keller confronts Chase regarding Tara.

Haley turns to Lucas for assistance as Nathan tries to flee. Brooke confronts Xavier, while Julien discovers information that aids Dan in tracking down Nathan. Meanwhile, Clay forms a bond with another patient.

Haley learns of a potential disaster that shakes her. Dan's efforts to find Nathan uncover troubling aspects of his past. Clay makes progress in his therapy. Brooke and Julian confront challenges with Xavier. Chase's growing worry for Chuck leads him to a breaking point.

Brooke and Julian implement stronger efforts to safeguard their family. Skills supports Mouth through a critical moment, while Chase deals with the fallout of defending Chuck. Clay and Logan come to a mutual understanding.

Dan, Julian, and Chris Keller work together to rescue their brother Nathan, while Brooke's tensions with Xavier intensify. Meanwhile, Quinn and Clay explore events from their shared history.

Nathan's disappearance leads to escalating risks, and Dan faces a life-threatening situation. Meanwhile, Brooke is taken aback by her father's unexpected return, and Clay and Quinn find themselves drawn back into Logan's orbit.

Haley takes the lead as host of the annual Tree Hill Burning Boat Festival, while Brooke confronts the emotional aftermath of her father's betrayal. Julian revisits an old project in hopes of reviving it, and Mouth and Millie introduce changes to their morning show. Meanwhile, Clay and Quinn prepare to welcome Logan to the beach house for the first time.

The final episode of One Tree Hill celebrates the tenth anniversary of the Tric nightclub, bringing back familiar characters and introducing new developments for the residents of Tree Hill.