Things are so bad between the Scott half-brothers that they are thrown off the court for rolling over the floor fighting each-other during a game in a North Carolina hick-town, Pinkerton. Brooke is hurt and scams a strong painkiller from a med student, but takes an overdose which forces Haley and Peyton to give the 'drunk' a ride; despite car trouble, they'll have it relatively easy getting back home. Coach decides to punish Nathan and Lucas by making them walk some 30 miles, which turns out just the 'fraternal' male bonding they needed as they are not given a lift but abducted by local hicks who force them to go shopping in their undershorts marked 'Ravens suck' on their backs; even after doing so, their ordeal is far from over... On the home front, Dan and Keith seize the evening without the boys to take Nathan's mother, Deb and Lucas's mother, Karen out, but land in the same restaurant where they get into a fight of their own.

The night of Dan and Deb's annual basketball appreciation party stirs up old wounds and new feelings as Karen makes a new friend, Keith faces off with his younger brother once again and Lucas finally makes his move on Peyton. Also, Haley and Nathan grow closer until Brooke spreads a vicious rumor that leaves Haley devastated.

Tension mounts now the Ravens may get their first ever undefeated season if they win against Cove City, but instead of encouraging his son, Dan barks at Nathan he doesn't go deep enough while ordering him to convince his mother he's not unhappy, thus blaming the poor kid for her punishing him by running Karen's place. He decides to take amphetamines supplied by Tim's brother, which make him so aggressive coach throws him out at training; when he gently tries to take the next step while kissing Haley, she also shows him the door. Brooke gets Lucas to go out as 'reward' for recommending a book she lobes, then makes him drink and- get a real tattoo, to Keith's in loco parentis despair and fury. At the crucial game, Nathan's second pill dose lands him first on the bench and next in hospital. Dan doesn't believe the doctors correct substance diagnosis; he didn't even call Deb, who tells him to leave home for good.

After Peyton walked in on Lucas kissing Brooke the night she got him drunk, they all feel uncomfortable but decide to stay friends; Haley and Peyton even team up to organize live entertainment in Karen's café. Because of Nathan's pills-disaster, coach cancels basketball practice till further notice, telling livid Dan -who fears for the Ravens' shot at a perfect season- 'the game is no fun any more' so he takes off pressure. Nathan feels happy again taking things easy with Haley, but Dan decrees they're 'going to have a good time' on the golf weekend he planned with Deb till she threw him out, leaving the boy no escape from worrying about his parents plausible divorce in between humiliating golf 'lessons' in his dad's arrogant style, till he walks off shouting nobody can be happy with a bully like Dan. Jake shows Lucas why coach cuts him slack: his 6 months old baby Jenny, abandoned by her mother, and gets the advice not to keep that secret any longer. Jake uses the 'open mike' at Karen's to out his baby; afterward Lucas invites Nathan to the Rivercourt where all the kids enjoy informal basketball, putting coach and Keith's worries to rest.

Nathan has moved into his own apartment, away from both parents. To prepare for a match away, Coach orders Lucas to coach Nathan's weakest points, and makes them uneasy roommates; in the evening the boys sneak out but the strip joint Tim 'could get them in' turns out to be queer. Peyton and Sparkle Classic cheer-leading coach Brooke also find themselves bunking together; when Theresa falls sick, Haley is recruited and gets a crash course. Mouth spies the other teams -he demonstrates with more talent then most girls!- so they rework both choreography (Brooke) and music (Peyton); after training Brooke gets the hot pool opened, the boys jump in and coach grills chaperons Karen and Peyton's dad Larry Sawyer, but nobody minds. The new routine rocks, so Brooke wins the choreography prize. In the game Nathan uses the fade-away Lucas proposed and scores the winning point. At the home front manager Keith feels smothered by Dan and his men, and makes a drastic choice.

Lucas, Nathan and Jake are auctioned off to the highest bidder in the annual "Boy Toy" charity auction and the night leads to surprising developments with old flames. Meanwhile, having missed out on the auction, Brooke ends up with Mouth and gives him the night of his life.

With the assistance of Peyton and Brooke, Lucas throws Nathan and Haley a wedding reception. Although Haley's parents support Nathan and Haley's marriage, Deb has a difficult time accepting it. Meanwhile, Dan's recent heart attack causes him to try and mend his relationships with Deb and Lucas.

Although Nathan and Haley are already married, Tim insists on throwing Nathan a post-wedding bachelor party, while Brooke throws Haley a bachelorette party. Meanwhile, Lucas tries to decide whether he should visit Dan in the hospital. Karen decides to go back to school and Nathan gets a job working for Keith at Dan's dealership.

Deb is angry to hear from Dan Lucas moves in, but hopeful now Haley has left Nathan he might also return. Nathan is a wreck, and seems determined to wreck his school-prospects; he won't listen to anyone, even hits the still taunting Dan. Jake and Jenny live in Peyton's room, but she is reluctant to become intimate again. Erica stops at nothing to defeat Brooke, but clever speeches by her and Mouth still turn the tide. Lucas seems to feel at home with Dan.

Lucas and Peyton hide Jake and Jenny at Nathan's place while he chases Haley. Lucas finds Dan's secret hiding place for cash and a secret ledger; when he and Andy come to get it at night, all is gone. Anna's former lover Darby turns up; she ends up coming clean to her parents, who still love her, but returns to boarding school. Nathan accepts an invitation to spend the night at the bar where Taylor works; they drink heavily and participate in the bar dancing show. Niki claims Jenny isn't Jake's biologically. Brooke stays late at a party without permission, misses her shift in the café, and learns to pay her debts and her dues chore-wise. Jake won't hear reason from his lawyer and chooses jail over handing over Jenny to irresponsible Niki, even if that's his best chance to get her back in a few months.

While Nathan is unconscious in the hospital, he dreams a nightmare alternative version of his life, in which Dan married Karen and lives with her and Lucas, while Keith is the successful car dealer, Dan is assistant coach and trains Lucas as the Ravens star. Nathan is the poor underdog living with Deb -who runs the café- but may still be recommended for Highflyers by coach Whitey if he wins a duel; Haley is his girlfriend, Brooke makes a pass at him. Karen cheats on Dan with Keith. Peyton goes steady with Lucas but tells Haley to warn Nathan about Lucas' dirty plans; Dan's attempt to bribe Nathan off actually motivates him to fight, so he is abducted, bound and dumped by Lucas's Ravens hardcore. Peyton dumps Lucas, who loses the duel after she picked Nathan up.

Brooke has a end of the summer party on the beach; Nathan is home from basketball camp; Lucas deals with Brooke's rules for dating; Peyton deals with family issues; Haley tries to tell Nathan how she feels.

Dan presents the Ravens opening show for the new basketball season, but after the choreographed cheerleaders the boys come rolling in with a public fight between Lucas and Nathan over Haley; then a major flashback... Brooke and Peyton audition would be-cheerleaders; the obvious winner is arrogant, slutty Rachel, who Brooke accidentally indicates when telling Lucas to date another girl. While Dans team plans his mayoral election campaign, Deb deliberately walks in dressed sluttier then a drunk whore. Captain Nathan puts Lucas on the bench for back-talk. Brooke wants to field Haley instead of Rachel. Coach grudgingly introduces Dan and smiling, to everyone's surprise, his late-hour mayoral opponent: Karen Roe! When Dan announces the team, Lucas calling Nathan 'just like' his dad starts their fight, and Brooke attacks Rachel. Coach is livid at the brothers- and makes Lucas co-captain. Rachel sits naked in Lucas's car, and Brooke chews both of them, to his surprise admitting she only wanted to be desired exclusively by proclaiming non-exclusiveness.

In an effort to keep her cheerleaders from fighting over the same guys, Brooke devises a `Fantasy Boy Draft', Haley and Peyton butt heads over Nathan, while Lucas has trouble keeping up with the brutal pace of basketball practise. Meanwhile, as the election nears, mayoral candidate Dan clashes with his new opponent.

As the fantasy draft dates begin, Brooke finds herself on an unusual double date, while Lucas gets closer to Rachel. Meanwhile, Karen and Deb take their campaigning to new heights.

After Lucas surprised Chris with Brooke, even her self-confidence isn't enough to remain assured she hasn't really lost the possible love of her life. Chris informs Nathan whom he thought already knew and gets knocked for once more breaking up a relationship for someone he's not even truly in love with. Dan phones the radio station to point out on air his competitor Karen is unmarried and checks on Nathans condition for the new season, but gets the cold shoulder. Tim looks forward to the boys getting tattoos this year. Karen nor cake can cheer up Lucas, who doesn't even feel like basketball anymore; Nathans advice in the locker-room to concentrate on his playing and forgive Brooke for love's sake don't help either. Coach tells the team he'll retire after this season, and expects them, his best team ever, to prove so by results; Lucas stinks worst of all at the first game, which is an utter loss. Haley and Nathan are back on speaking terms. Mouth shows 'mayor' Karen his cell-phone recording of Dan roughing up Nathan and coach throwing him out after the match.

Lucas reveals that he knows who tried to kill Dan in the dealership fire. Brooke, Peyton and Haley find themselves behind bars. Chris Keller convinces Nathan to be his wingman at a high-stakes poker game. The residents of Tree Hill finally choose a mayor.

Lucas and Peyton take a road trip together to find Ellie. While out of town, Lucas reconnects with a friend from his past.

Another terrible Ravens game; coach blames everything on total lack of team spirit. Keith is back, admitting to Lucas his fiancé Jules was not what he hoped, and just no match for Karen. Brooke must take the couch at Nathans place, but gets invited for Rogue Vogue, a fashion talent show in New York. Nathan fears Dan was right to suggest Haleys sudden lack of birth control is all too convenient. Coach punishes the boys by transferring them from the glorious stadium to a dump which they must first clean up; Nathan walks out, but after talking to Lucas and Dan about his chances for a scholarship etc. returns. Keith laughs at Dan's promise to prove he's the arsonist, but tells Karen he had intended to kill his brother but was beaten to it by Deb and helped her flee. Lucas shows Nathan the tactical advantages of studying the flaws in the old court. Karen warns Lucas to be careful with Brooke in every respect. Brooke finds out gratefully her design work was entered by- Rachel! Karen kisses Keith, but he is arrested for the murder attempt on Dan before her eyes...

Keith is arrested as suspect for the arson attempt on his brother Dan, but to the mayors anger soon released for lack of proof. The kids are supposed to get counseling about choosing a college, but nearly all have their minds elsewhere. Nathan and Haley make up, but have chosen colleges 3000 miles apart. Brooke believes Rachel deliberately entered her for the New York fashion contest because it's the same day as the cheerleaders' high-day, the Classic. Ellie insists Peyton shouldn't doubt about going to college at all. Mouth has enough of Brookes bitching, so he goes to the game with Rachel. Because Nathan missed political science class now Dan teaches that course, coach benches him, just when the major East Coast talent scout is present; still he gives Lucas the winning tactical tip, which really impresses coach...

It's the weekend of the Classic in Charlotte for the Ravens and their cheerleaders. Haley and Peyton go on a road trip with Brooke to New York for the Rogue Vogue fashion show before hopping on a plane to Charlotte in time for the secret sparkle classic cheer competition. A schedule change in New York though means Brooke has a big decision to make. Rachel does everything she can to mess with Brooke and Coach Durham interferes with chaperones Karen and Keith's weekend.

A dangerous day at Tree Hill High gives Nathan and Lucas a common goal, as they put their lives on the line to save their friends when a distraught student comes to school with a gun and holds Haley hostage.

The aftermath of the school shooting and the death of Jimmy Edwards forces everyone in Tree Hill to examine their lives. Nathan reassesses his relationship with Haley, while Brooke and Rachel join forces to heal the student body. Dan must deal with the ramifications of shooting Keith, while Lucas and Peyton consider the implications of their kiss in the library.

Rachel invites the gang for a weekend getaway at her family's cabin. Craziness will ensue, including a game of "I Never" which will cause characters to do things they normally wouldn't, and a nasty little issue Mouth has been harboring toward Rachel will surface. Meanwhile, Karen will confront Dan about Keith's death. Could she suspect the truth?

It's the weekend of the Coastal Classic, and with Lucas sidelined, Nathan has to step up on the court against an old rival who shows an interest in Haley. Brooke and Mouth plot revenge against Rachel while Dan goes head to head with Nathan's Uncle Cooper. Also, Peyton makes a life-altering decision.

On the night before Nathan and Haleys wedding, Brooke argues with Haley over the wedding dress. Meanwhile, Lucas and Karen return.

Nathan and Haley's wedding is a time of great joy. And great sadness. Peyton and Brooke fall out, Dan learns the truth about the fire, and Rachel gets publicly drunk....and publicly bitter.

Lucas and Brooke, now broken up, clash at a post-game party and Haley realizes that Rachel is plotting to seduce Nathan. Meanwhile, Peyton connects with her half-brother, Rachel reveals that she knows who is pregnant and Skills takes the court with the Ravens basketball team.

As Whitey's last game approaches, the residents of Tree Hill feel the pressure of a looming State Championship. Peyton reveals to Lucas that she has feelings for him. Haley learns the sex of her baby. Nathan and Lucas clash over personal and team goals. Karen shows Deb tough love, while Dan tries to strike a bargain with Daunte.

With senior prom only weeks away, Haley's frustration over her injuries increases and Skills and Mouth hatch a plan to help Nathan earn money for the big dance by stripping. Brooke betrays Rachel in order to get closer to a new guy and Peyton and Lucas resolve to be happy. Struggling with her drug addiction, Deb makes a choice that could end her life.

A class assignment reveals the deepest secrets and desires of Lucas and the students at Tree Hill High. Worried about college prospects, Skills turns to Haley, while Nathan wrestles with Deb's suicide attempt. Chase learns that Brooke cheated on her calculus exam, while nudity and drugs run rampant in the halls of the school.

Haley confronts Brooke regarding the stolen calculus test. Lucas and Peyton consider taking their relationship to the next level as Peyton and Brooke grow closer. In Deb's absence, Nathan throws a senior party at the Scott House, where a sex tape from Nathan's past surfaces.

On the day of Prom, the residue of Nathan's pre-Prom party has serious repercussions for everyone in Tree Hill. Haley asks Nathan for a list of his past sexual conquests. Rachel is suspended after taking the blame for the exam she stole with Brooke. Peyton tells Lucas she wants to skip the Prom entirely, but he refuses to take no for an answer. Finally Mouth and Brooke must deal with dating Clean Teens on Prom night.

It will be an unforgettable Prom at Tree Hill High when Lucas discovers who was in the hallway when Keith was killed. Meanwhile, Peyton's decision to skip Prom leads to dire consequences. Nathan and Haley vow to be romantic teenagers at Prom, while Dan tries to win Karen's affections, as the witness to his murder closes in.

As graduation day dawns in Tree Hill, some dreams begin as others end. Haley prepares for her graduation speech and her role as a young mother, while Nathan prepares for life without basketball. Brooke makes a heartfelt confession that puts her future in jeopardy. Lucas confronts Dan as Karen's life is threatened.

Dan must face the harsh consequences of his decision to murder Keith as Karen and Haley's pregnancies complicate the lives of Nathan and the graduating seniors of Tree Hill High. Lucas wrestles with his post-high school options, and Peyton and Brooke prepare to spend the summer in Los Angeles together.

Missing Nathan gives Jamie nightmares about Dan, who is indeed paroled. Lucas and Lindsay decide to 'coincidentally' have separate stag and hen nights at the same place, so Nathan and Haley are bound to meet. Brooke arranges a hot blind date for Peyton, but the joke is on her as Owen's chosen mate is Chase, Brooke's former 'clean teen' lover. Jamie's tireless efforts to get his mom and dad to make up In turn make Haley realize she shouldn't have tried to change Nathan. Ruthless business adviser and absent mother Victoria pushes Rachel out, to Brooke's disgust.

In the final chapter of One Tree Hill, the tenth anniversary of Tric brings old faces and new possibilities for the Tree Hill family. To celebrate the 10th anniversary they host a concert at Tric that includes Gavin Degraw. Julian buys Brooke's childhood home for them to live in. Nathan and Haley celebrate their 10th wedding anniversary.

A class assignment reveals the deepest secrets and desires of Lucas and the students at Tree Hill High. Worried about college prospects, Skills turns to Haley, while Nathan wrestles with Deb's suicide attempt. Chase learns that Brooke cheated on her calculus exam, while nudity and drugs run rampant in the halls of the school.

Rachel invites the gang for a weekend getaway at her family's cabin. Craziness will ensue, including a game of "I Never" which will cause characters to do things they normally wouldn't, and a nasty little issue Mouth has been harboring toward Rachel will surface. Meanwhile, Karen will confront Dan about Keith's death. Could she suspect the truth?

Nathan and Haley's wedding is a time of great joy. And great sadness. Peyton and Brooke fall out, Dan learns the truth about the fire, and Rachel gets publicly drunk....and publicly bitter.

With senior prom only weeks away, Haley's frustration over her injuries increases and Skills and Mouth hatch a plan to help Nathan earn money for the big dance by stripping. Brooke betrays Rachel in order to get closer to a new guy and Peyton and Lucas resolve to be happy. Struggling with her drug addiction, Deb makes a choice that could end her life.