whom Nash took under his wing as a protégé. She was killed in cold blood early in the fourth season by the Prowler, a killer seeking media glory whom Nash killed out of revenge and claimed it as self-defense. Yasmine Bleeth as Inspector Caitlin Cross (seasons 4 & 5): She had a tense relationship with Nash bordering on the unprofessional. Caitlin originally came to the SIU as an MCD Inspector investigating them, but eventually joined them. She had a brief romance with Nash, which ended when she left at the end of the fifth season to help her sister in Washington, D.C. Wendy Moniz as Inspector Rachel McCabe (season 6): Cassidy's senior partner and a new addition to the SIU in the final season. Rachel was a police officer originally working undercover for a corrupt Internal Affairs official. She eventually fell in love with Nash and later sacrificed her career to save Nash when she realized he was being framed. Cress Williams as Inspector Antwon Babcock (season 6): Evan's replacement in the final season. Antwon rescued the SIU from an explosion when he drove a car off a pier on his first day. He preferred to stay out of personal situations, but was very active in the force. He became close friends with Harvey, particularly when Harvey convinced him to reconcile with his father, a dying criminal. He occasionally suffered from epileptic seizures. Recurring Daniel Roebuck as Inspector Rick Bettina: A crooked SIU police officer turned criminal and a frequent headache to the SIU. In the beginning of the series, he considers Nash (who dislikes Rick) his best friend and at one point was Nash's boss as Rick's mother married the chief of police and gave him a job. Towards the end of the series, he tries to kill Nash and Joe, to cover-up his attempted rip-off of the police retirement fund. Angela Dohrmann as Stacy Bridges (seasons 1–4): Nash's ADA sister. Stephen Lee as Tony B: Mobster and police informant. Patrick Fischler as Pepe: Joe and Nash's gay friend, and secretary of their detective agency. Caroline Lagerfelt as Inger Dominguez (seasons 2–6): Joe's spouse from Sweden and mother of their infant child, and mother of Joe's adult son. A kind woman and loving wife, also the one really in charge of their household. Tracey Walter as Angel (seasons 2–6): A wise spiritual figure who often appears when dispensing advice