Caroline Julian is a prosecutor and works in the U.S. Attorney's office. She is portrayed by Patricia Belcher.
Her first appearance was in the first season episode, "The Man in the Morgue", which was followed by three more appearances in the second season in Judas on a Pole, The Man in the Mansion and Stargazer in a Puddle. She has a very demanding and bossy attitude, which overpowers even Brennan to a point where Brennan does not even argue with her. She has a deep understanding in the workings of the government and the way cases should be handled, she seems to have a friendship history with Booth and trusts in his instincts and beliefs when working on cases, although she often seems wary of their less orthodox methods. She has appeared numerous times to have Booth and Brennan in court and to solve their cases. In the alternative reality episode The End in the Beginning, Caroline works for Booth and Brennan's night club as their legal counsel.
Not much is known about Caroline's family life. She was once married to David Barron, a defense attorney who has also served as her main opponent in court, and they have a daughter who studied at MIT during season 2. She is revealed to be divorced in season 8, The Blood From the Stones
Although her place of birth and background have not as yet been discussed on camera, Caroline calls those close to her "cherie" and is prone to making references to New Orleans and the Gulf Coast.
She drives a 40 year old yellow AMC Gremlin with synthetic-panther-covered seats. Although it has an accident almost destroying the front part, during season 2 (in Judas on a Pole), it's seen again in later seasons.