died at the age of eight. She is the commanding officer of the detective squad at the NYPD's Fourth Precinct. She frequently tells the detectives to solve their cases and do it by the book. After the third season she’s never seen or heard from again as a result of her being dropped from the cast. Lauren Vélez as Det. Nina Moreno-Torres (seasons 2–4): Nina is a Puerto Rican–American. At the age of 16, she married her boyfriend Luis and gave birth to a daughter, Melissa. She gave the girl up for adoption after Luis abandoned her. She later dated and married Eddie Torres, but was widowed soon after following his murder. Her mother is a sergeant with the NYPD. Jonathan LaPaglia as Det. Tommy McNamara (season 3): Tommy is an Irish-Italian American detective. His father was a police officer who was killed in the line of duty, with many suspecting that he was corrupt. Prior to his transfer to the Fourth Precinct, he had very little interaction with New York's African-American and Latino neighborhoods or police officers. At the end of the third season, Tommy is killed after being shot to death by Nadine Jordan, whose gang he'd infiltrated while undercover. Marisa Ryan as Det. Nell Delaney (season 4): Nell is a young officer introduced in the fourth season. She lied about her age upon entering the police academy, but the NYPD chose to overlook this when she was exposed years later. She is a close friend of fellow detective Alec Stone. Josh Hopkins as Det. Alec Stone (season 4): The S.I.D squads tech expert. Born Alec D'Amico, he is the son of the head of a Brooklyn-based organized crime family. Alec's decision to pursue a career in law enforcement has estranged him from most of his relatives. He is a close friend of fellow detective Nell Delaney. Tommy Ford as Lt. Malcolm Barker (season 4): Malcolm is the commanding officer of the NYPD's Special Investigations Division. Most of the S.I.D.'s operations are covert and the detectives names and records are wiped from the database system when they go under. When they first arrive to his division, J.C. & Nina bump heads with him a lot due to his style of command as they are used to Lt. Cooper’s “by the book” approach as he has a different mentality, frequently instructing his detectives to "lie, cheat, [and do] whatever