As One Tree Hill continues to grow and break new ground, the show enters its ninth season with close to 200 episodes under its belt. Last season in Tree Hill, there were a great number of changes - both personal and professional - including the momentous and captivating marriage of Brooke and Julian, a change of career for Nathan and more than one family welcoming new additions.
Through it all, One Tree Hill continues to explore the delicate balance that contemporary young people face as they endeavour to build and define what their lives will be, while overcoming difficulties and embracing the good things that they sometimes take for granted. The series, now in its ninth season, continues to celebrate the most important things - among them the quest for love, laughter, health, friends, career and family - timeless pursuits that have always mattered, and matter still.
01 - Know This, We've Noticed
In the season premiere, 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.
02 - In The Room Where You Sleep
Brooke discusses a new business venture with her father (recurring guest star RICHARD BURGI -- Desperate Housewives), as Julian stresses about his own investment. Quinn convinces Clay to get help, and Millie struggles to be honest with Mouth. Meanwhile, Chris Keller makes Alex (recurring guest star JANA KRAMER) an offer she may not be able to refuse and Nathan volunteers to scout in Europe, leaving Dan with Haley and Jamie.
03 - Love the Way You Lie
Dan helps a struggling Haley at Karen's Café. Meanwhile, Quinn discovers that Clay is hiding something from her, and Chase tries to mend a broken heart. Brooke is let down by her lunch plans with her dad, and Julian makes a life-changing mistake.
04 - Don't You Want to Share the Guilt?
As Julian deals with his guilt, Brooke helps Haley confront a new rival café and its difficult owner. Meanwhile, Chase's new girl has a complicated secret, and Quinn takes extreme measures to help Clay realize he's worse off than he thought.
05 - The Killing Moon
As Quinn distracts Jamie, Haley searches for Nathan. Clay finally gets answers about his condition. Meanwhile, Julian attempts to get back to a normal life, while Brooke tries to give Tara (recurring guest star CHELSEA KANE -- Dancing with the Stars) a chance.
06 - Catastrophe and the Cure
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 Café, and Chris Keller confronts Chase about Tara (recurring guest star CHELSEA KANE).
07 - Last Known Surroundings
Haley seeks help from Lucas (guest star and former series star CHAD MICHAEL MURRAY) as Nathan makes an escape attempt. Brooke comes face to face with Xavier (recurring guest star DEVIN McGEE). Julian uncovers evidence that assists Dan in his search for Nathan. Clay makes a connection with another patient.
08 - A Rush of Blood to the Head
Haley receives news of a possible tragedy. Dan's search for Nathan leads him back to his dark past. Clay has a breakthrough in his treatment. Brooke and Julian deal with Xavier (recurring guest star DEVIN McGEE). Chase's concern for Chuck (recurring guest star MICHAEL MAY) pushes him to his limits. Former series stars BARBARA ALYN WOODS and ANTWON TANNER guest star.
09 - Every Breath Is a Bomb
Brooke and Julian take new measures to protect their family. Skills (recurring guest star ANTWON TANNER) helps Mouth get to a turning point, and Chase faces consequences for defending Chuck (recurring guest star MICHAEL MAY). Clay reaches a new understanding with Logan (recurring guest star PIERCE GAGNON). Meanwhile, Haley partners with Dan in his search for Nathan's whereabouts.
10 - Hardcore Will Never Die, But You Will
Dan, Julian and Chris Keller attempt to rescue Nathan. Brooke's conflict with Xavier (recurring guest star DEVIN McGEE) escalates. Quinn and Clay revisit the past.
11 - Danny Boy
The search for Nathan becomes increasingly dangerous, and Dan's life hangs in the balance. Brooke is surprised when her father (recurring guest star RICHARD BURGI) returns. And Clay and Quinn reconnect with Logan (recurring guest star PIERCE GAGNON).
12 - Anyone Who Had a Heart
As Haley prepares to emcee 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 (recurring guest star PIERCE GAGNON) first night at the beach house.
13 - One Tree Hill
In the series finale, the tenth anniversary of Tric brings old faces and new possibilities for the Tree Hill family.
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