As Brooke and Julian begin to adjust to life with their new children, Haley and Nathan find themselves dealing with similar issues. Although they don't know it yet, faces from the past threaten to interrupt plans for all their futures. Meanwhile, a mysterious problem arises for Clay and Quinn. Nathan finds out Dan came back into town. Chris Keller returns to run Redbedroom Records. ---- This episode is named after a song by An Horse.
Brooke discusses a new business venture with her father, despite her mothers wishes, as Julian stresses about his own investment in a sound studio. Quinn convinces Clay to get help, and Millie struggles to be honest with Mouth about his weight gain. Meanwhile, Chase asks Alex to move in with him as Chris makes Alex an offer she may not be able to refuse to tour. Nathan volunteers to scout in Europe, leaving Dan with Haley, Jamie, and Lydia. ---- This episode is named after a song by Dead Man's B
After Alex leaves for her tour, Chris looks to hire an intern and tries to cheer up Chase. Haley runs into trouble at Karen's Cafe when her chef quits to work for a rival cafe. Clay arouses suspicion in Quinn that he is cheating on her. Meanwhile, Millie accidentally humiliates Mouth on the air. Brooke tries to help her father secure funding for her new clothing line, and Julian gets distracted by the prospect of a potential renter for his sound stage, resulting in Julian forgetting his son, Dav
Clay gets into trouble and Quinn gets involved; Julian deals with his guilt over leaving the baby in the car; Mouth agrees to take care of his health but continues eating when Millie is asleep. Meanwhile, a new cafe opens and the owner immediately angers Brooke and Haley. ---- This episode is named after a song by Kate Nash.
Nathan seems to have vanished on his way home, Haley goes searching for him and ultimately suspects Dan of having something to do with it. Tara gives Brooke a cockroach-infested flower as a "Face to face friends request", ultimately causing Brooke to destroy Tara's cafe after Tara gets personal in her attacks. Chase continues to feel guilty for sleeping with Tara behind Chris Keller's back. Chase also feels unwanted after Chuck spends all his attention on Keller and later his father, who finally
Dan enlists Julian to help in his search for Nathan. Mouth fills Clay in about Nathan, as Haley explains Nathan's disappearance to Jamie. Brooke gets an idea of how to bring patrons to an empty Karen's Cafe, and Chris Keller confronts Chase about Tara. ---- This episode is named after a song by the band Explosions in the Sky.
Haley seeks help from Lucas as Nathan makes an escape attempt. Lucas takes Jamie and Lydia out of town to stay with him and Peyton until Haley can find Nathan and bring him home. Brooke comes face-to-face with Xavier who is up for parole. Julian uncovers evidence that assists Dan in his search for Nathan. Clay makes a connection with another patient in rehab. ---- Episode is named after a song by the band Explosions in the Sky.
Haley gets a phone call that may change her life forever. Clay receives life changing news while revisiting his past. While Dan revisits his past during his search for Nathan, Deb returns. Haley goes to identify a body that is thought to be Nathan. Chase goes to extreme measures to protect Chuck. ---- This episode is named after a song and album by Coldplay.
Haley partners up with Dan to help search for Nathan. Brooke and Julian take new measures to protect their family. Chase faces consequences for defending Chuck. Skills helps Mouth get to a turning point. Clay reveals his past to Logan. ---- Episode is named after a song by the band The Blood Brothers.
Dan, Julian and Chris attempt to rescue Nathan. During the rescue, Nathan is saved and Dan kills most of the attackers. When they are about to escape, Dan is shot by Demetri before he himself is shot by Nathan. Brooke's conflict with Xavier escalates when he attacks her in a parking garage, she is saved by the rival cafe owner Tara, who tasers him. Clay and Quinn revisit the past. ---- Episode is named after an album by the band Mogwai.
After successfully rescuing Nathan, Dan's life hangs in the balance. Nathan looks back on his father's life and forgives him for all he has done. Brooke's father surprises her when he comes back into town. Clay and Quinn reconnect with Logan. ---- Episode is named after a song by Andy Williams.
As Haley prepares to present the annual Tree Hill Burning Boat Festival, Brooke uses the opportunity to process her father's betrayal, while Julian tries to breathe new life into a past idea. Mouth and Millie make a change to their morning show, and Clay and Quinn get ready for Logan's first night at the beach house. Clay proposes to Quinn and Chase is offered to buy Tric. ---- This episode is named after a song by Dionne Warwick and later Cilla Black.
In the final chapter of One Tree Hill, the tenth anniversary of Tric brings old faces and new possibilities for the Tree Hill family; Quinn adopts Logan and marries Clay, Haley introduces Jamie to her predictions with Lucas and Julian buys Brooke her childhood home. In the time-jump, the Tree Hill gang are seen at Jamie's high-school basketball game, where his jersey is seen on the wall as the "all time top scorer". Bevin makes a guest appearance who is also seen back with Skills and Millie is p