One Tree Hill (season 4)

The residents of Tree Hill must deal with the aftermath of the shocking accident. Nathan and Rachel are okay while Cooper still remains in a coma. In the midst of all the chaos, Dan extends his help to Karen now that she is pregnant. Lucas and Peyton's friendship continues to grow stronger. Previously rivals, Brooke and Rachel move past their differences and manage to become good friends. Brooke has a difficult decision to make about her relationship with Lucas. Skills decides to try out for the Ravens.^[3]

It's her eighteenth birthday, but Brooke soon realizes that she has no one but Rachel to celebrate it with. Meanwhile, Nathan continues to struggle with memories of the accident. Dan continues to be haunted by remorse over his actions against Keith.

Peyton spends more time getting to know her newfound brother, Derek. Lucas gives up on his love for Brooke. Rachel tries to start a romance with Nathan.

A rumor surfaces that Brooke might be pregnant, causing Karen to worry as she fears that the baby might be Lucas'. Rachel continues to get closer to Nathan when she confesses that she saw Keith during the accident.

Nathan gets two surprises in a row, and everyone is eager to share their advice. Brooke decides to celebrate. Peyton's stalker attacks her and her real brother saves her with Lucas' help.

Nathan struggles with money problems and reluctantly asks Dan for help. Brooke learns the new man in her life is also her new English teacher. Peyton gets help from an unexpected source. Lucas returns to the Ravens just in time to help the team advance in the playoffs for the state championship.

Peyton tries to go back to school, but she breaks down. Brooke's fashions are a hit at the local show. Nathan is cornered into a no-win situation by Daunte. Deb takes drastic action to support her addiction.

Derek tells Peyton to give Lucas a chance just as Brooke tries to make up with him. Nathan continues to have trouble with Daunte. Rachel asks Haley to tutor her when she discovers she is failing a class.

As the Ravens prepare for the championship, Lucas learns Nathan intends to throw the game and decides on a risky plan to even the odds. Karen insists Deb show up for her son's final game and tries to help her get there. Dan makes a last plea with Daunte.

• Continuity error: The state championship game is depicted as being played at the RBC Center in Raleigh, home arena of the North Carolina State men's team. However, two crowd shots are from the Hilton Coliseum in Ames, Iowa, home of the Iowa State Cyclones.

After a heart attack, Lucas has a dream in which the spirit of Keith visits and shows him how much one life can affect the lives of others, in a nod to "It's a Wonderful Life". Haley is the victim of an accident and Dan helps out Nathan.

The aftermath of the events in Tree Hill begins. Lucas returns to his everyday life and tries to rekindle his relationship with Peyton. However, things are rougher for Haley when she discovers that Nathan was more involved in her accident than she could have ever imagined.

Haley is frustrated over her injuries. Skills and Mouth help Nathan earn some extra money as an amateur stripper. Brooke betrays Rachel to get with a new guy. Lucas and Peyton finally find happiness in their relationship. Olivia considers leaving Tree Hill again after her plot with Dan takes a turn for the worse.

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. Nathan wrestles with Deb's suicide attempt. Chase learns that Brooke cheated on her calculus exam.^[15]

Haley confronts Brooke regarding the stolen calculus test. Lucas and Peyton consider taking their relationship to the next level. 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.

It's Prom day, and emotions are running high at Tree Hill. An emotional Haley confronts Nathan about the sex tape and asks for a list of all his past sexual encounters. An angry Peyton asks Lucas to skip the dance altogether, but he refuses to take no for an answer. Brooke and Peyton let out all their frustrations in a confrontation that could tear them apart forever.

It's Prom night, but things start to go awry. Lucas remembers that someone was in the hallway when Keith was killed. Psycho Derek holds Peyton and Brooke hostage in Peyton's own house. Haley and Nathan vow to be romantic with each other throughout the night. Dan continues to win over Karen's affections. Within Reason guest star to perform during the Prom.

When Mouth and Rachel's road trip goes wrong, the other teens drive to their rescue. On the trip, Nathan and Haley get a second chance to enjoy their Prom. Peyton and Lucas decide to take their relationship to the next level. Brooke reveals the truth about the stolen calculus exam to Haley.

Brooke and Peyton finally rekindle their friendship. Nathan's past mistakes continue to haunt him and Haley. Lucas hears a shocking confession from the witness to Keith's murder.

As the end of the school year approaches, Peyton considers accepting a music internship in Los Angeles. Brooke tries to reconnect with Chase through yearbook signatures. Haley struggles to write her valedictorian speech. Dan suggests that Lucas get professional help when Karen continues to worry about his obsession with theories about Keith's murder.

As graduation approaches, Haley prepares for the recital of her valedictorian speech and motherhood. Nathan must adjust to life without basketball. Brooke makes a confession that may have great consequences. Lucas confronts Dan after Karen's life is threatened. The song "Times Like These" from the Foo Fighters is heard during the graduation scene. ^[23]

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.