<P> In Season 4, Lucas tries to get Brooke back, but she rejects him, feeling that the passion is no longer there . One day, he hurries to save Peyton from Internet stalker "Psycho Derek", and becomes considerably closer to her afterward . He also helps Karen, who is pregnant with Keith's baby, and plans on going to the University of North Carolina when he graduates so that he can be close to home in case she needs him . Dan also helps Karen with her pregnancy, wanting to make amends for Keith's death . After talking with Dan, Karen persuades Whitey to let Lucas play 15 minutes a game, so as not to let him miss out on something he loves . Brooke and Lucas try dating each other again, but realize that it is not what they truly want and is not what is meant to be, prompting Peyton to confess her feelings for Lucas . Lucas then discovers that Nathan is planning to throw the state championship game because of his debts . Lucas plans to prevent this and deliberately fails to take his heart medication in order to play better, but Nathan is inspired by learning that he is going to have a son and they win, with Lucas making the winning shot . During the celebration, Lucas, after receiving Brooke's blessing, sees Peyton and tells her that she is the girl he has been meant for . The two then share a long - awaited kiss . They become a couple at the after - party, but their happiness is short - lived when Haley gets hit by a car and Lucas tries to tell the paramedics what happened only to suffer a heart attack . As he is in the hospital, Lucas dreams that he is visited by Keith, who shows Lucas what life would have been like if he had been a lesser person . In the end, Lucas realizes that he has to go back to his life because he never told Peyton that he loves her . Lucas wakes up and begins a relationship with Peyton . After the failed attempt of prom in Tree Hill High, the group go on a rescue mission to save Mouth who has become stranded in Honeygrove . They all then crash the local Prom, where he and Peyton have sex with each other for the first time . He begins to investigate Keith's death, as the Keith in his dream suggested that Jimmy did not kill him, but he also starts getting closer to Dan, who tells Karen he wants a bigger part in Lucas's life . Lucas discovers the truth about Dan thanks to witness Abby Brown . He attacks Dan after walking in on him and Karen kissing and tells Karen that Dan killed Keith, but Dan convinces Karen that Lucas is delusional and needs help . Lucas then steals Deb's gun and confronts Dan in front of Karen, having set him up by sending him a message from "Abby". Karen collapses and Lucas fires a warning shot at Dan, telling him not to touch her . Karen is rushed to hospital with eclampsia and has an emergency c - section . Lucas is given a half - sister, who is named Lily Roe Scott when Karen regains consciousness . Later, Dan turns himself in for Keith's murder . Lucas graduates and gets, as a reward, his book (An Unkindness of Ravens) from his mother . That same day, he becomes an uncle with the birth of Nathan and Haley's son, James Lucas Scott, partly named after him . Lucas is named the godfather of James and announces that he will be assisting Whitey as Nathan's college basketball coach . </P> <P> One year from Season 4, Lucas becomes the head coach of the Cobras, his college basketball team, and leads them to victory in the championships . Thinking about his future, he goes to see Peyton and asks her to marry him . She declines, feeling that it is too soon . As he is about to leave LA, his novel is picked up by a fresh new editor, Lindsey Strauss . It is a moment when his greatest dream came true . He is about to call Peyton, but decides against it, and instead calls Brooke . They spend a crazy evening together, and, in the end, he kisses her because he feels lonely . Although Brooke still loves him at the time, she pushes him away, remembering Peyton . Soon after, he is scheduled to have a book signing in LA where Peyton is living and working . Having missed her, he calls her and invites her to come to the signing . Peyton comes, but she witnesses Lindsey giving Lucas a congratulatory kiss and assumes they are in a relationship and leaves thinking there is no hope for her and Lucas . Lucas thinks that Peyton did not bother to come, and consequently begins dating Lindsey . </P> <P> In Season 5, four years after high school graduation, Lucas, now 22, suffers from writer's block and is under pressure from his editor / girlfriend Lindsey . He also tries to help Haley with her son, James Lucas Scott . When Peyton comes back home, she reveals to him that she did come to the signing, and then inspires him by repeating his quote: "Your art matters". When he tells Peyton that the bartender she is flirting with at the Clothes Over Bros store opening is not good enough for her, it becomes obvious that, despite his relationship with Lindsey, he still loves Peyton . After remembering the night he proposed, he goes straight to her house, though she is not there . When Peyton begins to antagonize Lindsey, he goes to confront her, but things escalate into a verbal fight about their break up . A little bit later, after Peyton confesses her feelings and kisses him, he kisses her back, passionately, but later proposes to Lindsey, leading Peyton to tell him that she will bury her feelings so that he can be happy . He then wins his first game as the Ravens coach, although the female counterparts miss it because they were locked in the library . He soon has to go to Dan's parole and speak up in order to have him stay locked up . He decides to have Nathan as his best man and then fuses his bachelor party with Lindsey's . He also gives Haley his new book, and she tells him not to marry Lindsey after reading it . Lucas proceeds with the wedding, but Lindsey stops him after realizing his book is about Peyton . She leaves him, and when he chases after her, he sees Lindsey's bags packed . After a confrontation, she leaves him, saying, "People always leave, Luke . You know that ." (A reference to one of Peyton's famous lines, also featured in his first book .) Lucas flees to stay with his mother and Andy after the failed wedding . Andy convinces Lucas to go after Lindsey, prompting him to go to her and tell her that one day she will come back to him . She comes back to Tree Hill for Jamie's 5th birthday, but tells Lucas that it was really over . He then helps Brooke cope with having baby Angie around . After Lindsey calls him to tell him she is seeing someone, he blows up after an opposing player gets away with attempting to injure Quentin Fields, drawing himself a 10 - game suspension . He becomes heavily drunk and tells Peyton he hates her when she comes to his help . He later apologizes to her after being confronted by Haley . He tells her that it was hard to let her go, hard to see her and that it remains difficult for him, making apparent his love for Peyton . Lindsey comes by to tell him his book is over and he can e-mail her the dedication . When he does, she reveals by phone that she still loves him . He then decides to go to Las Vegas and calls someone to get married . Brooke, Peyton, and Lindsey are all shown answering the phone, and the viewers are left hanging as to whom he decides to propose to . </P> <P> In the first episode of the sixth season, the audience discovers that Peyton was on the receiving end of Lucas's phone call . He waits to see if she actually arrives, and moments later, he finds her through the crowd, making her way toward him with bags packed . They share passionate kisses, Peyton glowing with happiness, and then board the plane on their way to Las Vegas . When they get there, they spend the night in a kinky Vegas hotel room . The next day, they go to the wedding chapel, but the tackiness of the place convinces them that this was the wrong decision . Instead, Peyton takes Lucas to the hotel room where he first proposed to her and they do it all over again, but this time Peyton says "yes" before he has even asked the question . With the upcoming release of his new book, Lucas travels to New York to meet with Lindsey, and eventually tells her about his engagement to Peyton . He soon starts his book tour, but it fails fast and is canceled, so he returns home to Peyton . After the two resolve problems and fears of moving in together, Lucas is offered a movie deal by Julian Baker . Julian asks Lucas questions about Peyton before she gets there, and after she runs into Julian near the bathroom, it is revealed that he is her ex-boyfriend . For three weeks, Peyton fails to tell Lucas about Julian, and Lucas is angry when he discovers their past on his own . Although he is initially angry, they patch things up, and Peyton convinces Lucas to continue taking a part in the making of the film, despite his reluctance to work with Julian . The film is to be shot in Tree Hill, North Carolina . He also learns Peyton is expecting their first child . Though they initially have problems with Peyton's pregnancy, the fact that she may die if the baby is born, the two are eventually married by the lake where they first met, and have their reception at Tric . They soon have a healthy daughter, Sawyer Brooke Scott, which Peyton names after her best friend Brooke (similar to the naming of James Lucas Scott), and the two ride off into the sunset . </P>

When do peyton and lucas come back to one tree hill