One Tree Hill

The girl of Lucas' dreams shows up at the airport.

As Lucas and his fiancée enjoy planning their dream wedding, Brooke and Peyton reconnect, and Brooke, reeling from a threat to her store, reaches out to an unexpected ally.

Lucas returns from Las Vegas to face a tragedy, as Nathan and Haley struggle to find a way to help Jamie understand the death of someone close to them.

Lucas struggles to inspire the Ravens, while Haley investigates the disappearance of Dan. Brooke confronts an old demon from her past, and Nathan comes to terms with Deb's relationship with Skills.

Lucas and Lindsey face a tenuous future, and Nathan receives an offer from a pro basketball team. Haley unwittingly puts Jamie's life in peril, while Brooke struggles with giving up her company.

Lucas is joined by a familiar face as he begins his second book tour. Nathan is given an opportunity to play basketball again, which forces him to question his health.

Nathan and Haley must parent Jamie about facing a school bully, and Lucas and Peyton adjust to life living together as a couple.

Lucas' novel receives unexpected and surprising interest. Mouth receives interest as well, from his new intern. Jamie grows enamored of Sam and her rebellious façade, and a would-be suitor grows enamored of Brooke.

The past comes home to roost as the residue of deception, anger and romantic mistrust permeates the lives of several Tree Hill residents.

Tension fills the air backstage at Peyton's USO show as Lucas deals with Peyton and Julian's romantic past. Haley battles stage fright, and Nathan struggles with a decision that could change his career.

Karen's Café is transformed into a glamorous 1940s nightclub with Lucas as its proprietor.

Lucas takes a trip to Hollywood to meet his film director, and Nathan gets a pro basketball tryout. Peyton struggles with Mia to focus on her follow-up album, and Millicent confronts Mouth about Gigi.

Peyton learns some startling news that she must share with Lucas. Nathan struggles in a new professional environment, and Brooke's search for Sam, who has run away, forces her to confront her feelings about the night she was attacked.

As news of Peyton's condition spreads, Mouth and Millicent struggle to remain a couple, and Brooke tries to figure out Julian's intentions. Peyton and Lucas babysit Jamie and his friend while Haley and Nathan spend a night out together.

Lucas and Julian try to choose a director for their movie, and Peyton has mixed feelings about a surprise gift from Lucas. Plus, Brooke struggles with relationship issues.

Lucas wrestles with casting for his movie while Peyton tries to prepare for their wedding. Dan advises Jamie on a school crush.

Peyton and Lucas receive a startling surprise about the pregnancy as the relationship between Brooke and Julian comes to a crossroads. Nathan and Haley celebrate their anniversary while Dan and Deb babysit Jamie.

Lucas and Julian hit a setback with the production of the film. Peyton and Haley help Mia with her new single. Brooke must intervene when Sam is arrested. Jamie discovers the truth about Dan and Uncle Keith.

Julian makes Brooke a startling offer. Lucas brings Nathan and Jamie to an important place from his past, while Peyton prepares for the future. Sam and Jack take a stand against the principal who fired Haley.

When Peyton's pregnancy is threatened, Lucas struggles to pick up the pieces. Victoria returns to lure Brooke back to Clothes over Bros. Haley and Nathan clash over the decision to pull Jamie from his school.

Brooke discovers something that could change Sam's life. Nathan questions his dreams of playing in the NBA, while Haley receives an unexpected offer from guest star Nick Lachey.

Brooke and Haley throw Peyton a baby shower, while Sam grows closer to Victoria. Lucas and Jamie bond while working on Peyton's car, and Nathan learns that NBA scouts will be at his next game. Meanwhile, Skills and Lauren go on a date that goes all wrong.

On Peyton and Lucas' wedding day, surprise guests are in attendance. Haley plays an unexpected role in the ceremony, while Nathan hopes to be called up to the NBA. Skills keeps Jamie on a short leash, and Brooke does the same with Nick Lachey.

Nathan is released from the Chiefs and is forced to face Haley and Jamie. On the eve of Peyton's delivery, Lucas and Peyton receive a surprise visit from Karen. Dan is on death's door, and Brooke and Victoria prepare to re-launch Clothes over Bros.