<P> He temporarily works at the Jeffersonian as a guide for children visiting the place and demonstrates his brilliant talent as a former science teacher . However, Brennan is concerned about a convicted felon having access to a lab that investigates crimes . Max also introduces Brennan to her cousin Margaret Whitesell, portrayed by Deschanel's real - life sister Zooey Deschanel . </P> <P> Brennan is best friends with her coworker, Angela, saying in the 6th - season premiere she loves Angela "like a sister" and is going to be an aunt to Hodgins' and Angela's newborn child . It is revealed at the end of the season six finale "The Change in the Game" that Brennan is pregnant and the father is Booth . </P> <P> In Season 7, episode 2 "The Hot Dog in the Competition", Brennan and Booth found out they were having a baby girl . Their daughter, Christine Angela Booth (named for Brennan's mother and her best friend), was born in a stable during the episode "The Prisoner in the Pipe". In the Season 7 finale, "The Past in the Present", key evidence in the death of her friend, Ethan Sawyer, is linked to Brennan . Max convinces her to go on the run along with Christine, saying that if she is arrested, even if she is found innocent, she may never see her daughter again . </P> <P> In Season 8 premiere, it is revealed that while on the run, Brennan was communicating with Angela, via flowers, and eventually used this as a way to communicate with Booth . Despite being on the run, Brennan risks her safety and decides to meet directly with Booth in a hotel room after months of being a single mother . Eventually, they arrest Christopher Pelant, who was the real murderer of Ethan Sawyer, and Brennan is allowed to return to her family . Although Pelant blackmails Booth to prevent him from accepting Brennan's proposal by threatening to kill five innocent people if Booth accepted, also warning Booth not to give a reason for his refusal, this threat is removed when the team manage to kill Pelant, and Booth and Brennan marry in the Season 9 episode' The Woman in White' . </P>

When do brennan and booth have a baby