The guys of Tree Hill must make life-changing decisions
Lucas and his fiancée enjoy planning their dream wedding. Haley is worried about Nathan.
Quentin's death brings sorrow to Tree Hill, and Haley and Nathan must find the words to help Jamie understand.
Brooke confronts Victoria, while Peyton meets the musician Mick Wolf and Haley has problems with a student.
Lucas faces a grilling from Peyton when he goes to New York and sees former flame Lindsey, to plan his new book.
Popular barman Owen returns to Tree Hill and introduces Nathan to basketball team Slamball, while Lucas kicks off his book tour in Nebraska.
Haley gets in a fight with another mother over their sons' fall-out. Meanwhile, Peyton and Brooke have their first hitch in married life.
Lucas is surprised by the interest his novel attracts, while Mouth receives interest of another kind; from his intern.
Nathan confronts an old enemy; Brooke is unsure whether to date Owen - who broke her heart - again and Lucas argues with Peyton.
Lucas confronts Julian about his past with Peyton, Haley suffers stage fright and Brooke's arrangement with Sam is thrown in the balance
Lucas dreams that he is the owner of a glamorous nightclub in a 1940s mob movie, where Haley is the lounge singer
Brooke is stunned to find that Samantha is in her room with a boy. Elsewhere, Lucas is ecstatic when he meets the director of the movie.
Peyton shares shocking news with Lucas. Brooke desperately searches for Sam and has to confront her feelings about the night she was attacked.
News of Peyton's condition spreads around Tree Hill; Brooke tries to suss Julian out and Lucas and Peyton babysit.
Lucas and Julian struggle to find a director for their film. Elsewhere, Peyton is puzzled when Lucas gives her a present.
Lucas begins casting for his film, Peyton starts planning the wedding, Dan gives Jamie love advice, Brooke meets the actress who will play her in the movie, and Nathan receives some exciting news
Brooke and Julian come to a crossroads in their relationship, Peyton and Lucas discover some shocking news about the pregnancy and Nathan and Haley celebrate their anniversary
Lucas encounters setbacks in the production of his film; Brooke comes to Sam's aid; Peyton and Haley help Mia with her single; and Jamie finds out about Dan's betrayal
Lucas revisits a place from his past and takes Nathan and Jamie with him; Brooke is startled by Julian's surprising offer; Skills and Mouth go on a road trip; and Sam and Jack stick up for Haley
Peyton has further problems in her pregnancy, while Nathan and Haley clash over the decision to take Jamie out of school
Brooke discovers something that could change Sam's life; Peyton and Lucas go on a memorable road trip; and Haley receives an unexpected offer from guest star Nick Lachey
Brooke and Haley throw a party for Peyton to celebrate the impending birth of her child, Sam grows closer to Victoria, and Jamie and Lucas bond
It's Peyton and Lucas's wedding day. Haley plays a unexpected role in the ceremony and Brooke is anxious about Nick Lachey (appearing as himself).
Peyton is due to give birth but she and Lucas are distracted by a surprise visit from Karen. Dan's health deteriorates and Nathan returns.