Det. Mike Mazza is left alone in enemy territory; Det. Brian Quinn and his team get involved in a domestic quarrel that leads to a horrible discovery; Det. Steven Peitler chases a Columbian cartel drug lord.
Det. Mike Mazza goes undercover to befriend a drug dealer; Det. Kenny Roe discovers the truth in a case involving a homeless person who appears to have been accidentally burned alive; Det. Clare Romano must make sense of the senseless murder.
Det. Tommy Mansfield searches for the killer of a mother in a road rage attack; Det. Joseph Loughran fears a pattern may be developing when an elderly woman is found dead; Det. John Moeser discovers a bloodbath at a family home.
Det. Steve DiSchiavi discovers his Brooklyn accent is a huge liability when a murder investigation goes south; Det. Joseph Loughran goes cross country to find a teenage killer; Det. Kenneth Clancy gets his first assignment.
Det. Mike Mazza has to blast his way out of a heavily guarded crack house; Det. Vivian Potter investigates a murder; Det. Kenneth Clancy uses new fingerprint technology to solve a cold case of murder.
Det. Ken Clancy is on the case of a cat burglar who's been nicknamed "Spiderman" by the press; Det. Mark Valencia hunts a mugger who's been targeting old ladies; Det. Derrick Parker must solve the murder of a church organist.
Det. Bobby Bolson suspects an inside job when a department store is robbed; Det. Tom Weil faces a case when the survivors of a fatal car crash leap up from their hospital beds and run off; Det. Tommy Mansfield fishes for clues when a man goes missing.
Det. Steve DiSchiavi handles the case of a brutally murdered drug dealer. Then, after four people are butchered by a gang in a bodega robbery, Det. Mike Carrano works with the one lucky survivor to find the killers.
Det. Dan King is put to the test on his very first day as a negotiator when a gunman takes an elderly couple hostage. Det. John Sexton is haunted for years by the memory of a girl's skeletal remains.
Det. Bobby Bolson faces a tense hostage situation; Det. Bob Alongi handles a deli store robbery that involves a double murder; Det. Eddie Keevan chases carjackers who robbed a recently retired man of the car of his dreams.