Lucas & Nathan bear the brunt of Dan's abuse as he coaches them into the playoffs, pushing both of them to their emotional breaking points. Haley is stunned after Dan threatens her, causing her to reconsider her relationship with Nathan. Meanwhile, Whitey finds out that his medical condition may be more serious than he first expected, & Dan learns a shocking secret from Deb. ...

After a particularly spectacular basketball game, Lucas quickly supplants Nathan as the team's most popular player. Sexy cheerleader Brooke immediately sets her romantic sights on the new star athlete. Frustrated by Lucas' success--and goaded on by Dan--Nathan rallies his teammates & begins a hazing campaign against Lucas, including trashing the outdoor court where Lucas practices. The pranks escalate until Nathan & the guys abduct Lucas & order him to quit the team before something terrible happens to him. But one player, Jake (recurring guest star BRYAN GREENBERG), defies Nathan & supports Lucas. Nathan seeks the ultimate revenge on Lucas by attempting to seduce Lucas' best friend, Haley, persuading her to tutor him & then flirting relentlessly. Haley agrees to help Nathan with his homework only if he will stop harassing Lucas, but even she finds it hard to resist Nathan's charm, & she keeps the entire arrangement secret from Lucas. ...

Haley convinces Lucas to go with the team to a party at Nathan's beach house, hoping that the guys will become friendlier. When Lucas sees the wealth that is denied him, he finally confronts his mother about why she lets Dan ignore them. Meanwhile, when Nathan's mother, Deb Scott (recurring guest star BARBARA ALYN WOODS), returns home & tries to deal with her angry son, she turns to Karen for advice. ...

Lucas asks Keith to play with him in the annual " Father & Son" basketball game & realizes he got the better father figure after Dan publicly humiliates Nathan on the court. Meanwhile, Peyton has a hard time dealing with the anniversary of her mother's death & finds a comforting ally in Whitey. ...

When Whitey ejects Lucas & Nathan from the team bus due to their misconduct on the basketball court, the half-brothers are stranded 30 miles from home. They encounter a carload of punks who threaten them with a gun. Injured during the game, Brooke needs Peyton to drive her home &, in an unlikely turn of events, Peyton asks Haley for help. Meanwhile, Karen & Keith attend a business function, & tempers flare when Nathan's mother, Deb (recurring guest star BARBARA ALYN WOODS), is seated at their table with Dan. ...

Hoping to have fun, Brooke & Peyton attend a college party, but the situation gets bad when one of the guys, Gabe (MIKE ERWIN
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After fighting with his father & Haley, Nathan succumbs to the pressure & takes amphetamines to help him play basketball better. However, he isn't prepared for the destruction the drugs do to both his body & his family. Meanwhile, Peyton intends to rekindle her relationship with Lucas, but when she arrives at his house, she witnesses him with Brooke. ...

At the hospital bed where Dan lies after a heart attack, Deb contemplates her role in the tragedy. On his way to attempt reconciliation, Dan had found Deb making love to Keith. Meanwhile, Haley & Nathan have gotten married in a ceremony attended only by her parents. Peyton & Brooke begin to recapture their friendship with a day on Brooke's family boat & vow to avoid letting guys come between them again. Whitey learns that he has a brain tumor. & Lucas is living in Charleston with Keith, both having left their problems behind & started new lives. But the news of Dan's hospitalization leads to some soul searching on both of their parts, & when Lucas & Keith arrive back in Tree Hill, life only becomes more tumultuous for everyone involved. ...

Concerned about his brother's health, Nathan informs Karen that Lucas did not take the medical test for his heart. Meanwhile, Dan asks Keith to continue to work at the dealership as vice president, & Keith accepts. Peyton confronts rumors at school that she is a lesbian, which affects her friendship with Anna (recurring guest star DANIELLA ALONSO), while the gap between Nathan & Haley continues to grow. ...

Haley is surprised when her older sister Taylor (recurring guest star LINDSEY Mc KEON) comes to town--but not as shocked as Nathan, who recognizes Taylor from a past tryst. Meanwhile, Brooke & Felix (recurring guest star MICHAEL COPON) start a relationship. Jake (recurring guest star BRYAN GREENBERG) surprises Peyton when he shows up in Tree Hill. & Anna (recurring guest star DANIELLA ALONSO) confides a deep secret to Lucas. ...