her to take point in an investigation, she made various dioramas to explain her reasoning. In the third-season episode "Class Action Satisfaction", she is revealed to be a nudist. She is killed in the sixth-season episode, "Misconduct," as part of a complex plan to frame the forensics department for poor handling of a recent case, but the subsequent investigation exposed the killer's true agenda. Brian Dennehy as Detective Kenny Leahy. Donnie Wahlberg as Lieutenant Joe Grant, an old rival of Jane's who has known her since childhood. He constantly made fun of her, calling her "Frog Face" and "Roly-Poly Rizzoli" because she was slightly chubby when she was younger. When he leaves for Washington, D.C, after being appointed as the liaison between Boston and Homeland Security, he claims that he has liked her for a very long time. John Doman as Patrick "Paddy" Doyle, an Irish-American crime boss and the biological father and protector of Maura Isles. To protect her from his diehard father, Paddy claimed Maura had died as a baby and made sure she was adopted. Jacqueline Bisset as Constance Isles, a visual artist and the adoptive mother of Dr. Maura Isles. She loves Maura but is sorry that they don't have a close relationship. Colin Egglesfield as Thomas "Tommy" Rizzoli, the well-meaning, good-looking but dim younger brother of Jane and Frankie. Convicted for running over a priest (non-fatally) in a crosswalk on his third DUI violation, he returns to the family fold following his release from prison. As of the season two episode "He Ain't Heavy, He's My Brother", he is 32 years old. He tries to kiss Maura to pay her back for her kindness, but she stops him and he develops a crush on her as he works on starting a new life. He later fathers a child, TJ, and grows up a lot. Chris Vance as Charles (Casey) Jones, an old flame of Jane's from high school, reunited with Jane during season two. A US Army officer assigned to the Middle East, he returns to Boston in season three but breaks up with Jane because of injuries that left him partially paralyzed below the waist. He returns in season four's first episode after a successful operation and proposes to Jane, but when he receives the offer of a promotion to colonel, he decides to stay in the army, leaving Jane behind, since she was