<Li> Chris Vance as Charles (Casey) Jones, an old flame of Jane's during 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 as she was unwilling to leave her life . He is aware that Jane was pregnant with his child, but respects her decision to raise the child alone as he had also made the choice to return to the army; she loses the baby midway through the fifth season after being attacked while protecting a witness . </Li> <Li> Darryl Alan Reed as Rondo, a man with access to information in the criminal world . Although Jane initially dismisses his offer to be her confidential informant, he does become her informant later on and is currently providing Jane with information from the criminal world . He has also been shown to have a comical character persona, similar to Larry Laffer . He frequently hits on Jane, calling her "Vanilla", and eventually develops a friendship with Angela, referring to her as "Mrs. Vanilla". He is revealed to be an ex--jazz singer in "This Is How a Heart Breaks". </Li> <Li> Billy Burke as Gabriel Dean, an FBI agent often seen working with the Boston Homicide detectives and Medical Examiner's Office . He later becomes romantically involved with Detective Jane Rizzoli, but she ends this relationship when he tries to use her as part of a plan to capture Paddy Doyle that forced Jane to shoot Paddy . </Li> <Li> Chazz Palminteri as Francesco "Frank" Rizzoli, Sr., Jane, Frankie and Tommy's father . He owns and runs a plumbing business called Rizzoli and Sons . He and Angela separate and then divorce after the first series . He later tries to have their marriage annulled so that he can remarry in a Catholic ceremony . He returns to announce he has stage 2 prostate cancer, and, despite the news, his family finds it difficult to overlook his past transgressions . </Li>

Who plays gabriel dean in rizzoli and isles