One Tree Hill

The girl of Lucas' dreams shows up at the airport. Plus, Nathan's comeback is halted by news that could change his career.

Lucas and his fiancée plan their wedding, Brooke and Peyton reconnect, Jamie catches Skills and Deb kissing and Nathan works with Quentin (ROBBIE JONES) on his basketball skills.

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.

Peyton is surprised when a famous musician visits her studio. And Brooke confronts an old demon from her past.

Haley learns the truth about Dan, which leads to a final showdown with Nanny Carrie (recurring guest star TORREY DeVITTO).

Lucas is joined by a familiar face as he begins his second book tour, and Peyton and Mick (recurring guest star JOHN DOE) have a confrontation over his identity.

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

Lucas' novel receives great interest; Mouth receives interest also, from his new intern. Jamie is enamored of Sam (recurring guest star ASHLEY RICKARDS) and her rebellious facade.

Nathan finds himself face to face with an old rival; Brooke deals with someone who once hurt her; and Lucas's novel leads him into unchartered and threatening waters.

There's tension at Peyton's USO show as Lucas deals with Peyton and Julian's (guest star AUSTIN NICHOLS - "John from Cincinnati") romantic past. ANGELS AND AIRWAVES performs.

In a special episode, CHAD MICHAEL MURRAY pens a tribute to the classic films of the 1940s. Karen's Cafe is transformed into a glamorous nightclub with Lucas as its proprietor.

Lucas goes to Hollywood; Nathan gets a basketball tryout; Peyton struggles with Mia (KATE VOEGELE) about her album; and Julian (AUSTIN NICHOLS) wants Brooke to design for his film.

Peyton receives startling news that she must share with Lucas. Brooke's search for Sam (ASHLEY RICKARDS) forces her to confront her feelings about the night she was attacked.

As Peyton's news spreads, Mouth and Millicent struggle to remain a couple. Haley and Nathan spend a night out while Peyton and Lucas babysit Jamie.

Lucas and Julian (AUSTIN NICHOLS) try to choose a director for their movie, Peyton has mixed feelings about a gift and Brooke struggles with relationship issues.

Lucas tries to cast his movie while Peyton prepares for their wedding; Dan advises Jamie on a crush; Brooke meets the actress who will play her; and Nathan gets exciting news.

Peyton and Lucas get startling news about the pregnancy, and Brooke and Julian's (AUSTIN NICHOLS) relationship comes to a crossroads. Plus, Dan and Deb babysit Jamie.

Lucas and Julian (AUSTIN NICHOLS) hit a setback with the film. Peyton and Haley help Mia (KATE VOEGELE) with her new single. JAMES VAN DER BEEK appears as Adam.

Julian (AUSTIN NICHOLS) makes Brooke a startling offer. Lucas takes Nathan and Jamie to a key place from his past. Sam (ASHLEY RICKARDS) and Jack (EVAN PETERS) take a stand.

When Peyton's pregnancy is threatened, Lucas struggles to pick up the pieces. Victoria (recurring guest star DAPHNE ZUNIGA) tries to lure Brooke back to the business.

Brooke discovers something that could change Sam's (ASHLEY RICKARDS) life. Plus, Haley receives an unexpected offer from guest star NICK LACHEY (appearing as himself).

Brooke and Haley throw Peyton a baby shower, while Sam (ASHLEY RICKARDS) grows closer to Victoria (DAPHNE ZUNIGA). Plus, Nathan learns NBA scouts will be at his next game.

Peyton and Lucas' wedding day has finally arrived. Haley plays an unexpected role in the ceremony and Brooke keeps guest star NICK LACHEY (appearing as himself) on a short leash.

Nathan is released from the Chiefs, former series star MOIRA KELLY pays Lucas and Peyton a visit and Brooke and Victoria (DAPHNE ZUNIGA) prepare to re-launch Clothes over Bros.