In episode 22 of season 6, "The Hole in the Heart '', which saw the death of Vincent Nigel - Murray (Brennan 's favorite intern) at the hands of renegade sniper Jacob Broadsky, Booth has Brennan stay at his apartment for her safety. Later that night, Brennan, still overcome with shock and grief over Vincent 's death, goes into Booth 's bedroom and they talk about the events of that day, and then allows Booth to hold her in bed. It is implied in the following day that they had sex. In the last scene of the season 6 finale, "The Change in the Game '', after the birth of Angela and Hodgins ' son, Brennan tells Booth that she is pregnant and that he is the father.
when do booth and brennan sleep together for the first time
episode 22 of season 6