US drama. As Lydia's condition deteriorates, Haley and Quinn try to reconnect with Taylor - meanwhile, Nathan helps Jamie come to terms with his grandmother's impending death, and Brooke is furious about Alex's tryst with Julian.
Contains mild language and scenes of teenage misbehaviour Turn on Parental controls
18. The Last Day of Our Acquaintance - US drama. As Lydia's condition deteriorates, Haley and Quinn try to reconnect with Taylor - meanwhile, Nathan helps Jamie come to terms with his grandmother's impending death, and Brooke is furious about Alex's tryst with Julian.
More infoUS drama. Nathan has to face a shocking accusation that could jeopardise his sporting career and which leaves Clay in a difficult position, Brooke gets her new fashion line ready for a big launch, and Jamie celebrates his seventh birthday.
US drama. Julian and Brooke decide to move in together, Haley records her new album and works with Mia to save Red Bedroom Records from closure, and Clay is forced to defend Nathan against a growing scandal.
US drama. As Clay and Nathan disagree about how to manage the worsening scandal, Haley wonders if there is any truth in Renee's accusations - meanwhile, Quinn and Brooke organise a photoshoot.
US drama. The scandal surrounding Nathan becomes public knowledge, Haley persuades Quinn to talk to her estranged husband David, and Mouth makes a decision that could jeopardise his career.
US drama. Brooke allows Julian to continue working with Alex but goes against her better judgement, Millicent gets a new job that could cause trouble for Mouth, and Clay and Quinn grow closer.
US drama. Nathan's scandal threatens his sponsorship deals and makes Haley consider taking matters into her own hands, and Clay reveals a big secret to Quinn.
US drama. Dan invites Renee onto his TV show to reveal the truth about her pregnancy, Quinn delves into David's past, and Sara and Clay have a heart-to-heart.
US drama. Julian goes on a camping trip with Nathan and the guys but struggles to fit in, Brooke and Haley bond during a girls' night in, Quinn helps Clay adjust to his tragic loss, and Dan and Rachel find it hard to escape their past.
US drama. Haley goes back to the stage, Brooke receives life-changing news, and Dan returns to Tree Hill but causes much displeasure to Nathan, who is about to sign a new NBA contract.
US drama. Nathan becomes annoyed with Clay and causes a rift between Haley and Quinn, and Brooke tells Julian about her fears about Alex.
US drama. Nathan and Haley's careers force the family to make a tough decision, Julian tells Alex a secret that leads to a confrontation with Brooke, Clay tries to resurrect his career as an agent, and Jamie finds out about Skills' new job.
US drama. Quinn helps Clay win Nathan back as a client, Millie's downward spiral causes her relationship with Mouth to reach a crossroads, Brooke struggles with Julian's reaction to Alex's crisis, and Nathan and Haley prepare to leave Tree Hill.
US drama. Alex is discharged from rehab and tries to make amends with the people that she has hurt, Nathan and Jamie join Haley on the last stretch of her tour, and Brooke and Julian are reunited.
US drama. When Taylor and David arrive at the Scotts' house, Nathan tries his best to keep Haley calm as Clay helps Quinn through the awkward encounter - meanwhile, a heartbroken Brooke turns to Alexander for support.
US drama. The friends forget Haley's birthday following a 1980s-themed alumni party at Tree Hill High that forces Julian to relive his dorky adolescence.
US drama. Nathan and Haley receive a surprise visit, Clay offers Quinn support as she faces unexpected news, Alex sets her sights on Alexander, and Brooke and Julian struggle to maintain their professionalism as their film begins shooting.
US drama. Nathan helps Haley and Jamie face up to Lydia's situation, Clay and Quinn spend time apart, and Brooke and Julian's relationship is tested.
US drama. As Lydia's condition deteriorates, Haley and Quinn try to reconnect with Taylor - meanwhile, Nathan helps Jamie come to terms with his grandmother's impending death, and Brooke is furious about Alex's tryst with Julian.
US drama. Clay is ambushed on the eve of Quinn's gallery opening by an uninvited guest, Nathan spends the day with Jamie, and Haley struggles to cope with her mother's death.
US drama. Haley struggles to cope after her mother's death, Brooke deals with the fallout of Alexander's tryst with Victoria, and Alex discovers a secret that could threaten Julian's film.
US drama. Nathan struggles to reach a despondent Haley, Quinn leads Jamie on a treasure hunt, Julian showcases his film to Brooke, and Clay is forced to deal with a deranged Katie when she claims to be his dead wife Sara.
US drama. Haley tries to overcome her depression by joining Nathan, Jamie, and the rest of the gang on a trip to Utah for the premiere of Julian's film - Meanwhile, Katie guns for Clay and Quinn.