Aside from their love for hoops, Lucas and Nathan seemed to have little in common. But the two young men are bound by the fact that they share the same father. The star of the basketball team, Nathan was raised to inherit his father's popularity and wealth, while his half-brother, Lucas, was raised in modest surroundings, the only child of a single mom.
When Lucas joined the Ravens team, his transition into Nathan's world created a love triangle with Peyton. Complicating things even further, Peyton's feisty best friend, Brooke, quickly set her sights on Lucas as well. And it didn't take Nathan long to notice Lucas' best friend, Haley, an intriguing girl who helped bad-boy Nathan become a kinder person. The journeys of the people who inhabit Tree Hill have been vast, from Lucas's tentative steps off the river court into high school popularity, from Nathan and Haley's first kiss to marriage, from Peyton and Brooke's deep friendship to their estrangement and back. But in other ways, the journey has only just begun.
01 - The Same Deep Water As You
Aside from their love for hoops, Lucas and Nathan seemed to have little in common. But the two young men are bound by the fact that they share the same father. The star of the basketball team, Nathan Scott (series star JAMES LAFFERTY) was raised to inherit his father's throne amidst popularity and wealth, while his half-brother, Lucas (series star CHAD MICHAEL MURRAY), was raised in modest surroundings, the only child of a single mom. When Lucas joined the Ravens team, his transition into Nathan's world created a love triangle with Peyton Sawyer (series star HILARIE BURTON). Although she was Nathan's girlfriend at the time, Peyton felt an instant connection to Lucas. Complicating things even further, Peyton's feisty best friend, Brooke Davis (series star SOPHIA BUSH), quickly set her sights on Lucas as well. And it didn't take Nathan long to notice Lucas' best friend, Haley James (series star BETHANY JOY GALEOTTI), an intriguing girl who helped bad-boy Nathan become a kinder person.
While the teenagers, including the guys' friend Mouth McFadden (series star LEE NORRIS), struggled to find their places in the world, the adults in Tree Hill were left to deal with the residue of decisions they made years ago. Nathan's father, Dan (series star PAUL JOHANSSON), and Lucas' mother, Karen Roe (series star MOIRA KELLY), were high school sweethearts. When Karen became pregnant during their senior year, she was devastated by Dan's decision to put his own life and career first. He went off to college on a basketball scholarship, leaving Karen behind to raise their son, Lucas, alone. After Dan's dream of a basketball career didn't work out, he returned to town with Deb (series star BARBARA ALYN WOODS), the wife he had met in college, and his newborn son, Nathan.
Lucas and Nathan's rivalry on and off the court even brought back old emotions for grizzled basketball coach Whitey Durham (series star BARRY CORBIN--not appearing in this episode). Whitey coached Dan when he was the school's star player, and now he is coaching both of Dan's sons.
In the season premiere, the aftermath of the post-wedding car accident unfolds. While Haley is deeply affected by Nathan's attempt to rescue his uncle Cooper (recurring guest star MICHAEL TRUCCO) and Rachel Gattina (recurring guest star DANNEEL HARRIS) from the underwater wreck, Brooke confronts Lucas with her true feelings, and Peyton makes a startling discovery. Also, pressured by the thought that someone knows he killed his brother, Dan assaults Deb.
02 - Things I Forgot at Birth
As the lives of Nathan, Rachel (recurring guest star DANNEEL HARRIS) and Cooper (recurring guest star MICHAEL TRUCCO) remain turbulent following the car accident, Brooke celebrates her 18th birthday but finds it diminished by her struggles with Peyton. Lucas and Karen come to terms with her pregnancy and that of someone else close to Lucas. And Haley becomes aware of Deb's past addictions.
03 - Good News for People Who Love Bad News
Lucas and Brooke, now broken up, clash at a post-game party, and Haley realizes that Rachel (recurring guest star DANNEEL HARRIS) is plotting to seduce Nathan. Meanwhile, Peyton connects with her half-brother; Rachel reveals that she knows who is pregnant; and Skills (recurring guest star ANTWON TANNER) takes the court with the Ravens basketball team.
04 - Can't Stop This Thing We Started
Peyton introduces hip-hop sensation LUPE FIASCO (himself) at the nightclub Tric, while rumors that Brooke is pregnant run rampant. Still dealing with the car accident, Nathan buys a motorcycle, despite Haley's reservations. Meanwhile, Lucas clashes with Derek (recurring guest star MATT BARR - "Commander in Chief"), a newcomer who is very interested in Peyton, and Deb double-crosses Karen. Also, Rachel (recurring guest star DANNEEL HARRIS) poses for Maxim magazine.
05 - I Love You But I've Chosen Darkness
When Lucas discovers that newcomer Derek's (recurring guest star MATT BARR) interest in Peyton is more than brotherly, Derek becomes menacing. Haley feels Nathan slipping away after he receives a scholarship offer to attend Duke University. Meanwhile, as rumors of Brooke's pregnancy spread, Rachel (recurring guest star DANNEEL HARRIS) uses the Internet to set Brooke up on a blind date with an older guy. And at Nathan's request, Deb tries to overcome her pill addiction.
06 - Where Did You Sleep Last Night
Nathan approaches Dan for help with his and Haley's finances. Despite his heart condition, Lucas rejoins the Ravens, teaming with Skills (recurring guest star ANTWON TANNER). Feeling isolated and alone, Peyton receives comfort from an unlikely source. Brooke begins dating again but discovers that her new boyfriend is not all that he seems to be. Mouth gets an unexpected proposal. And an old acquaintance of Dan's, Daunte (recurring guest star basketball player RICK FOX - "Oz"), shows a sudden interest in Nathan.
07 - All These Things That I've Done
Brooke copes with the T.A.R.T. fashion show and a new boyfriend. Rachel (recurring guest star DANNEEL HARRIS) makes the cover of Maxim magazine, causing chaos at Tree Hill High. Lucas learns of Nathan's dealings with Daunte (recurring guest star RICK FOX), and ultimately has to choose between Nathan and his love for basketball. Haley takes a babysitting job but finds herself in over her head. And Peyton's half-brother, Derek (recurring guest star ERNEST WADDELL), forces Peyton to confront her deepest fears. CariDee English, a real-life contestant on "America's Next Top Model," guest stars as Tia.
08 - Nothing Left to Say But Goodbye
Derek (recurring guest star ERNEST WADDELL) convinces Peyton to take a chance with Lucas--but, at the same time, Brooke is approaching Lucas about getting back together. Meanwhile, Daunte's (recurring guest star RICK FOX) latest demand leads Nathan to seek help from an unlikely source: Dan. When Rachel (recurring guest star DANNEEL HARRIS) learns that she has gotten a failing grade, she turns to Haley for tutoring. And Nathan is named Most Valuable Player of the Ravens at the annual sports banquet.
09 - Some You Give Away
As Whitey's last game approaches, the residents of Tree Hill feel the pressure of a looming state championship showdown. Meanwhile, 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. And Dan tries to strike a bargain with Daunte (recurring guest star RICK FOX).
10 - Songs To Love and Die By
Lucas receives an unlikely visitor: his supposedly dead uncle Keith (former series star CRAIG SHEFFER). Meanwhile, the lives of Haley and her unborn child are threatened when she experiences serious complications with her pregnancy. Nathan wrestles with the guilt and consequences of his dealings with Daunte (recurring guest star RICK FOX). Dan tries to make amends for Keith's murder. And Peyton and Brooke try to patch up their differences.
11 - Everything in Its Right Place
Following his heart attack, Lucas returns to school, hoping to rekindle his romance with Peyton. Haley learns that Nathan was responsible for her accident. Brooke and Rachel (recurring guest star DANNEEL HARRIS) devise a plan to steal the next calculus exam. Dan faces murder charges. And Deb breaks out of her rehabilitation center.
12 - Resolve
With senior prom only weeks away, Haley's frustration over her injuries increases. Skills (recurring guest star ANTWON TANNER) and Mouth try to help Nathan earn money for the big dance by stripping. Brooke betrays Rachel (recurring guest star DANNEEL HARRIS) in order to get closer to a new guy. Peyton and Lucas resolve to be happy. And, struggling with her drug addiction, Deb makes a choice that could end her life.
13 - Pictures of You
A class assignment reveals the deepest secrets and desires of Lucas and the students of Tree Hill High. Worried about college prospects, Skills (recurring guest star ANTWON TANNER) turns to Haley. Nathan wrestles with Deb's suicide attempt. And Brooke's new classmate, Chase (recurring guest star STEPHEN COLLETTI - "Laguna Beach"), learns that Brooke cheated on her calculus exam.
14 - Sad Songs for Dirty Lovers
Haley confronts Brooke regarding the stolen calculus test. Meanwhile, Lucas and Peyton consider taking their relationship to the next level. Peyton and Brooke grow closer. And, in Deb's absence, Nathan throws a senior party at the Scott house, where a sex tape from Nathan's past surfaces.
15 - Prom Night at Hater High
On the day of the prom, everyone in Tree Hill experiences the repercussions of Nathan's pre-prom party. Haley asks Nathan for a list of his past sexual conquests. Rachel (recurring guest star DANNEEL HARRIS) is suspended after taking the blame for stealing a test with Brooke. Peyton tells Lucas that she wants to skip the prom entirely, but he refuses to take no for an answer. And Mouth and Brooke deal with their "Clean Teens" dates on prom night.
16 - You Call it Madness, But I Call it Love
Lucas discovers who witnessed his uncle's killing a year ago. Meanwhile, Peyton's decision not to attend the prom leads to dire consequences. Nathan and Haley vow to just be romantic teenagers at prom. And Dan tries to win Karen's affections, as the witness to the murder he committed closes in.
17 - It Gets the Worst at Night
In an episode shot on location in Honey Grove, Texas, as part of national contest, the teens of Tree Hill mount a rescue mission to save Mouth from his ill-advised road trip with Rachel (recurring guest star DANNEEL HARRIS). During the journey, Haley and Nathan get a second chance to enjoy the prom, and Lucas and Peyton take their relationship to the next level. Meanwhile, Brooke tells Haley that she lied about stealing the calculus exam, and Nathan struggles with the residue of a past mistake.
18 - The Runaway Found
Nathan fears for his future as past mistakes come back to haunt him and Haley. Lucas hears a shocking confession after making contact with the mysterious witness to the murder of his uncle. And Brooke rekindles her friendship with Peyton after crossing paths with Chase (recurring guest star STEPHEN COLLETTI).
19 - Ashes of Dreams You Let Die
Nathan and Haley grow closer, despite the recent scandal. Brooke wonders if a spark might be rekindled with Chase (recurring guest star STEPHEN COLLETTI). Peyton receives a tempting offer that could ultimately take her away from Tree Hill. Mouth reconnects with Gigi (recurring guest star KELSEY CHOW). And Lucas tells Karen that Dan is a murderer, setting off an explosive series of events.
20 - The Birth and Death of the Day
As graduation day at Tree Hill finally arrives, Brooke's guilty conscience prompts her to make an important decision, while Haley prepares her valedictorian speech. Peyton accepts an internship in California. Karen experiences problems with her pregnancy. Unable to get a scholarship at any college due to his recent scandal, Nathan tries to define his future. And Lucas tells Deb the truth about what Dan did.
21 - All of a Sudden I Miss Everyone
In the powerful fourth season finale, the Tree Hill High School graduates share their bittersweet final moments together. At the same time, both Karen and Haley go into labor, while their loved ones stand by. Brooke has a surprising reunion with someone from her past. Peyton struggles with the thought of spending the summer away from her friends. Dan tries to assuage his guilt by making a life-changing decision. And, reflecting on the amazing journey that has brought them to the point of being true brothers, Nathan and Lucas seek closure regarding Dan.