<P> Booth often takes Bones along to his investigations and interrogations, despite his superiors' and Caroline's initial reservations about a "squint" being in the field . Initially he was irritated by the scientific jargon she frequently used but over time comes to enjoy her company . He also taught her some investigative techniques and "black ops stuff", such as using a credit card to break open a locked door . In Season 4, at Sweets' persuasion, he allows her to interrogate suspects and since then, she has co-interrogated suspects with Booth in Sweets' absence . In the field, he sometimes takes advantage of her status as a civilian to obtain information which he, as a federal agent, would otherwise be unable to obtain without going through the time - consuming bureaucratic process . They often go undercover together as a couple whenever a case requires . </P> <P> Booth shows an apparent jealousy of Brennan's romantic relationships, particularly in the episodes "Two Bodies in the Lab", "The Woman in Limbo", "The Headless Witch in the Woods", "The Man in the Mansion", "The Boneless Bride in the River", "The Con Man in the Meth Lab", and "A Night at the Bones Museum". In Season 2 his FBI colleague Special Agent Tim "Sully" Sullivan asks him for "advice" on how to woo Bones, Booth tells him simply that he will not "help (him) get my partner into bed". Booth has a habit of intimidating, confronting or competing with anyone he believes to have a sexual interest in Brennan . He is extremely protective of her, and is often defensive of her to the point of physically assaulting those who pose a threat to her safety . Likewise, Bones has defended him whenever his ability is called into question and repeatedly made known that Booth is the only FBI agent she (and the other "squints") tolerate working with . Booth has saved Brennan's life in several episodes, such as "Aliens in a Spaceship", "The Wannabe in the Weeds" and "The Woman in the Garden". In the third season, their relationship takes on a new component when they are forced to undergo partners therapy with Sweets, who observes that they are very close and there is emotional and sexual tension between them . Partners therapy is extended indefinitely . The partners share their first (in a flashback) and third kisses in "The Parts in the Sum of the Whole"; the second occurs in "The Santa in the Slush" when Booth and Brennan agree to kiss under mistletoe in front of Caroline Julian, an attorney Booth frequently works with . Nearly every episode after season three ends with a scene of Booth and Brennan bonding, which become increasingly romantic over time, reflecting the ever - growing affection Booth and Brennan have for each other . This comes to a head in "The Critic in the Cabernet," in which Brennan asks Booth to donate sperm to father her child . He is startled but eventually agrees . The two begin making plans for her insemination, but before she can go through with it, Booth is diagnosed with a brain tumor . </P> <P> In Season five, Booth realizes his love for Brennan as he recovers from his tumor . However, he is cautioned by both Dr. Saroyan and Dr. Sweets to be sure of his feelings before confessing his love to Brennan . Afraid that his feelings for her are related solely to his tumor and coma, Booth is conflicted about whether or not to tell Brennan . Afterwards, their relationship remains fraught with sexual tension . Although she shares his feelings, Brennan rejects his advance and states her uncertainty about the possible outcomes of such a relationship given their seemingly conflicting personalities . Booth agrees to respect her wishes and attempts to move on as they continue to work together . In the episode "The Boy with the Answer", Booth is confronted with the possibility that Brennan, claiming she is "tired of dealing with murders and victims and sadness and pain", might leave the Jeffersonian permanently . In the final scene of this episode, Booth watches as Brennan turns to face him while riding away in a taxi . Brennan departs for a year - long anthropological expedition to the Maluku Islands, while Booth agrees to spend a year in Afghanistan, training soldiers to apprehend terrorists . They say goodbye at the airport, agreeing to meet one year later . Their relationship takes a downturn after their return to DC due to Booth's relationship with journalist Hannah Burley; Brennan is apparently disappointed after learning that Hannah gets along with Parker . When Brennan admits that she still has feelings for Booth, he turns her down and says that he loves Hannah . Hannah departs after she turns down Booth's rather half - hearted proposal . Brennan and Booth begin to rekindle their relationship . </P> <P> In the episode "The Hole in the Heart", in which Vincent Nigel - Murray dies, Booth has Brennan stay at his apartment for her safety . Later that night, Brennan is still overcome with grief over Vincent's death and she turns to Booth for comfort . The two fall into his bed together in a seemingly intimate but non-sexual embrace . The next day, she tells Angela Montenegro that she "got into bed with Booth". In the following episode, she tells Booth that she is pregnant with his child . At the start of season seven, a very pregnant Brennan and Booth are in a relationship and going back and forth between apartments . Booth suggests that they should have their own place; Brennan wants Booth to move into her apartment . It causes a minor rift between them . At the end of the episode they are in bed looking at houses on the internet . Booth also tells Brennan he loves her and left it to her to decide when she wants to get married . After much discussion, Booth and Brennan agree to give up their apartments and move in together . In the episode "The Crack in the Code", they decide to buy a two - story house in the suburbs--which they jokingly called "The Mighty Hut"--that Booth found at a police auction and renovate it, (according to a mailed check sent to Brennan in "The Heiress in the Hill", in season 9, the "Mighty Hut" 's address is "1297 Janus Street, Washington DC, 20002"). In the following episode, Booth delivers their daughter in a small stable off the road when Brennan cannot make it to the hospital to give birth . They name their baby Christine Angela, after Bones' mother and Angela Montenegro . Booth also tells Bones that she would be the one to ask him to marry her since he believed in marriage and she was the one who needed the make the decision . In the season finale Bones is framed by tech - savvy serial killer Christopher Pelant, who is released when the jury finds him "not guilty". Bones, with help from Max, is forced to go on the run with Christine in order to avoid being arrested and buy Booth and the team enough time to clear her . Prior to her departure, she and Booth had Christine christened into the Catholic church out of respect for his religious beliefs . </P>

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