Meanwhile, Lucas struggles with Brooke's new rules for dating, Peyton tries to come to terms with the new truths about her family, and Dan remembers what happened the night of the fire at his dealership. Nathan comes home from High Flyers to reconnect with Haley, but he and Lucas are at each other's throats. Dan's fate after the fire is revealed.Д«rooke organizes an 'End of Summer Beach Party,' but soon finds she's the only one in a party mood. Peyton investigates the mysterious woman who claims to be her mother while Nathan must deal with Haley's reappearance at the same time as the fire at Scott Motors. Lucas awaits Brooke's return to Tree Hill after a summer spent with Peyton.

Credited through to With Tired Eyes, Tired Minds, Tired Souls, We Slept.

The residents of Tree Hill attempting to cope with their losses after a school shooting rocks the town.

Keith's return to Tree Hill as the prime suspect in arson.

Dan's mayoral candidacy and his quest to discover who tried to kill him in the fire.

The new girl, Rachel, clashing heads with Brooke and seducing Mouth.Nathan and Haley attempting to reconcile after her return from tour.Peyton dealing with the arrival of her biological mother.Lucas and Brooke's complicated relationship.The season chronicles the first half of senior year for Lucas and his high school classmates. The catastrophic: Tragedy strikes Tree Hill High, and suddenly winners of the cheerleading tourament or basketball championships seems insignificant compared to who lives.and who doesn't.'

The bad: Dan gets a rival for worst person in Tree Hill - a conniving redhead named Rachel, the new girl at school. Brooke creates a hot clothing line, and Keith comes home. Peyton comes to terms with her birth mother. The good: Haley fights to save her marriage. Tree Hill is rocked by powerful new events - good, bad and catastrophic. People come together - except Dan, consumed by anger as he tracks down whoever started the fire that almost took his life. A time to grow up, forget, forgive, dream, learn and love all over again.

Watch one tree hill season 3 episode 18