troubled past and has spent some time in prison. He is involved with a woman named Amy Hollister and loves her two daughters, Emma and Hayley. After Temperance and he were abandoned by their parents, he also abandoned his sister, which led to long-held animosity from her. He first appears in the season one finale, where he patches things up with his sister and also reunites with his father in season two. His last appearance is in season three, although he is mentioned in later seasons. Billy Gibbons as Angela Montenegro's father (seasons 1–10): The character is a fictionalized version of Gibbons himself–a bearded guitarist in a famous rock band that plays sold-out stadium shows–but despite all the knowing winks to him being Gibbons, the character is never named, only referred to in dialogue as "Angela's father", "Dad," "my father". Patricia Belcher as Caroline Julian (seasons 1–12): Caroline is the acerbic, witty, and often meddlesome assistant U.S. attorney (AUSA) from the U.S. Department of Justice. She is a friend of Booth's and is always willing, if not eager, to help his partner and him in their cases. She gives Booth a hard time after he accidentally wrecks her prized AMC Gremlin in the course of a hot pursuit. Ryan O'Neal as Max Keenan (seasons 2–12): Max Keenan, or Matthew Brennan, is the father of Russ and Temperance Brennan. His wife and he were nonviolent bank robbers who became involved with gangs in the 1970s. They changed their identities to lead honest lives with their children. Booth arrests Max on murder charges in season two, and he is tried in season three. The jury finds him not guilty on all counts and he is released, finally able to reconnect openly with his children. He is a frequent presence in Brennan and Booth's lives, particularly after the birth of his granddaughter Christine. During season 12, he dies while protecting his grandchildren. Eugene Byrd as Clark Edison (seasons 3–12) is the most serious and professional of the Jeffersonian interns, as well as the most organized; he initially dislikes discussing his personal life and his coworkers' personal lives while at work. While Brennan is on the run after being suspected of murder, Cam hires Clark as the new forensic anthropologist, since he is the only "squintern" who earns his doctorate during his internship. After Brennan's return, Cam keeps him on to focus on archaeological