In Part 1 of the two-part sixth-season opener, Lucas' chosen lady meets him at the airport, while Dan's accident proves life-threatening. Elsewhere, Nathan's comeback hits a bump; Mouth and Millicent consider leaving town; and Brooke and her mother clash over Brooke's company once again.
Conclusion. Lucas and his fiancée plan their ideal wedding. Elsewhere, Nathan practices improving his basketball skills with assistance from Quentin; Brooke seeks help when she learns her store is in danger; Jamie spots Skills kissing his grandmother.
Lucas has trouble inspiring his team. Meanwhile, Haley looks into Dan's disappearance; Brooke confronts a person from her past; Nate deals with his mother's new relationship; and Peyton is shocked when a famous musician drops by her studio.
Nathan gets an offer from a professional basketball team, and Haley unknowingly puts Jamie's life in danger. Meanwhile, Peyton learns a secret about her new recording artist, and Haley discovers what's going on with Carrie and Dan.
Lucas embarks on his second book tour, accompanied by a familiar face. Meanwhile, a basketball opportunity has Nathan questioning his health; Haley assists a student; and Peyton and Mick come to blows regarding his identity.
Nathan and Haley help Jamie deal with a school bully, while Brooke learns how difficult it is to be a good role model. Elsewhere, Lucas and Peyton adapt to living together; and Mouth tries to get rehired by the TV station.
Lucas' second novel proves successful, and Nathan's basketball comeback looks to be on the right track. Elsewhere, Mouth's new intern shows interest in him; Jamie takes a liking to Sam's rebellious attitude; and Brooke has a would-be suitor.
Nathan and Brooke deal with people from their pasts as he confronts an old rival and she encounters someone who once hurt her. Meanwhile, Lucas finds that his novel leads him into some dangerous territory.
Peyton organizes a USO show, which includes performances by Angels and Airwaves and Mia (Kate Voegele). Backstage, Lucas tries to come to terms with Peyton and Julian's romantic past, and Haley copes with stage fright. Elsewhere, Brooke gets an upsetting phone call regarding Sam, and Millicent confronts Mouth about Gigi.
Lucas travels to Hollywood to meet the director of his film, and Julian asks Brooke to do some costume designing for his movie. Elsewhere, Nathan has a pro-basketball tryout; Peyton pushes Mia to work on her second album; and Jamie is hesitant about going to his school talent show.
Peyton hears surprising news that she has to share with Lucas. Meanwhile, Lucas learns that Julian has been keeping another secret from him; Nathan's new professional environment proves to be challenging; and Brooke searches for Sam, which triggers memories of her own attack.
Peyton's friends learn about her condition, and she and Lucas babysit Jamie and his pal so Haley and Nathan can have a night out. Elsewhere, Mouth and Millicent are on the verge of breaking up, and Brooke tries to uncover Julian's true intentions. Chad Michael Murray directed the episode.
Lucas struggles with casting choices for his movie, and Brooke meets the actress who will portray her. Meanwhile, Peyton focuses on wedding preparations, and Dan gives Jamie tips on how to deal with a school crush. Bethany Joy Galeotti directed the episode.
Peyton gets unexpected news about her pregnancy, and Dan and Deb babysit Jamie as Nathan and Haley celebrate their anniversary. Elsewhere, Brooke and Julian reach a turning point while Mouth and Millie try to repair the damage done to their relationship.
Lucas and Julian suffer a setback with their movie, while Peyton and Hayley assist Mia with her latest single. Elsewhere, Brooke deals with Sam getting arrested, and Jamie learns what Dan did to Keith.
Brooke gets a surprising offer from Julian, and Sam and Jack face off against their school principal. Meanwhile, Lucas visits a meaningful place from his past and brings Nathan and Jamie along; and Skills takes Mouth on a road trip.
Lucas tries to deal with a threat to Peyton's pregnancy, and Victoria attempts to get Brooke back on board with Clothes Over Bro's. Elsewhere, Haley and Nathan disagree about Jamie's education, and Mouth wants to repair his relationship with Millicent.
Haley gets a surprising offer from Nick Lachey, while Nathan has doubts about a possible NBA career. Meanwhile, Lucas and Peyton go on a road trip, Jamie attends his first school dance, and Brooke uncovers something that could affect Sam in a big way.
Brooke and Haley host a baby shower for Peyton. Meanwhile, Sam and Victoria bond; Lucas and Jamie spend some quality time working on Peyton's car; and Skills and Lauren go on a date fraught with disaster. James Lafferty directed the episode.
Surprising guests arrive for Peyton and Lucas' wedding, and Haley plays a special role in the ceremony. Meanwhile, Skills keeps tabs on Jamie; Brooke keeps an eye on Nick Lachey; and Nathan waits to hear from the NBA.
In the sixth-season finale, Karen visits Lucas shortly before Peyton's delivery. Meanwhile, Nathan has to tell his family that he was cut from the Chiefs; Dan's health worsens; and Brooke and her mom get ready to relaunch their company.