In Cincinnati, a teenager watching a street fight is killed by a stray bullet. With little to go on, veteran homicide Detective Bob Randolph must piece together the truth. (S6, ep 1)
In Dallas, Detective Phil Harding investigates a brutal shooting in a motel and, in Memphis, Sergeant Ron Collins must track down a murder suspect. (S6, ep 10)
In Miami, a mechanic is shot to death in his shop. Detective Juan Hererra and his team focus on why someone would want the victim dead. (S6, ep 11)
In Miami, a recent high school graduate is gunned down and left to die in his father's arms. It's up to Sgt Eunice Cooper and her team to track down the suspects. (S6, ep 2)
When a well-loved 58-year-old man is found shot dead, clutching a five-dollar bill, Detectives Thompson and Lindle learn that the victim was murdered a day before his birthday. (S6, ep 3)
Detectives Castillo and Castellanos work the murder of a young man brutally shot in broad daylight. But will any witnesses dare to come forward? (S6, ep 4)
In Detroit, a warm spring day turns deadly when a basketball game erupts in violence. Officer Jo Ann Miller must track down the players, one by one, to find a killer. (S6, ep 5)
Detective Ricardo John discovers a John Doe, stabbed to death behind an abandoned church in Miami. But the discovery of the victim's true identity leads to chaos. (S6, ep 6)
Officer Anthony Wright Jr is called to an abandoned house, where a man has been shot dead. Is another murder that happened moments later, nearby, related? (S6, ep 7)
Detective Ponce and Sgt Melancon unravel the mystery of a man found shot dead in his car. Could a stolen mobile phone hold the key to cracking the case? (S6, ep 8)
Detective Rolly Garcia investigates the murder of a 17 year-old boy beaten to death and dumped in a car. And, in Dallas, a man is found dead in a car park. (S6, ep 9)
Loved To Death/Unmasked: In Memphis, Sgt Caroline Mason and her team respond to a convenience store shooting, where cameras captured the last few moments of a man's life. (S4, ep 1)
Motel Massacre: A hotel in Memphis becomes a warzone when a gunfight breaks out, and in Kansas the murder of a two-year-old sparks a manhunt for an eight-year-old killer. (S4, ep 52)
Inner Demons/Kids With Guns: Miami detectives uncover shocking secrets about a man murdered outside his own apartment. (S4, ep 2)
The Boogie Man: Dallas detectives investigating a murder uncover disturbing facts about the victim's dangerous lifestyle. (S4, ep 3)
The Witness/The Trunk: Miami detectives racing to solve the brutal murder of a husband and wife discover that their lead witness has a lot to lose. (S4, ep 4)
Pre-Emptive Strike/Unlucky: Dallas detectives find a decomposed body and are quickly drawn into a fast-paced manhunt to track down a mentally unstable suspect. (S4, ep 5)
Runaround: In Memphis, detectives struggle with witnesses who give dubious statements about a shooting, while in Phoenix, surveillance footage leads police to a killer. (S4, ep 46)
Fool For Love: A decomposed body in Dallas leads detectives to a trail of deceit, while in Memphis, a corpse dumped in a field leaves investigators scrambling for leads. (S4, ep 48)
The Wrong Man: An innocent bystander falls victim to a drive-by. The intended target points police towards the shooter and his chauffeur; can detectives track them down? (S4, ep 49)
Family Affair: A young woman is brutally murdered - could the killing be personal? (S4, ep 51)
In Memphis, a killer vanishes from inside a sealed gas station after shooting the attendant to death. Meanwhile a nine-year-old Miami girl is killed in a shootout between two men.
In Memphis, Tennessee, Sergeant Caroline Mason takes it personally when a 75-year-old man is shot dead in her old neighbourhood.
In Memphis, a well-loved neighbourhood investor is shot, and the only eyewitness is a young girl on her way home from school. (S5, ep 11)
Detectives Bob Ermatinger and Ken Penrod investigate the murder of an unidentified young woman found shot to death at White Rock Lake. (S5, ep 12)
Detective Rick Duggan unravels the mystery of a dumped body rolled up in a carpet and Detective Fernando Bosch takes it personally when a 66 year-old Cuban man is shot. (S5, ep 13)
In Dallas, Detective Eddie Ibarra discovers a woman shot dead in the lobby of her work place. Will a video surveillance tape give him any leads? (S5, ep 14)
Miami homicide detectives race to solve the slaying of an innocent tourist. Meanwhile in Memphis, a shooting at a school dance leaves a student dead and others seriously injured.
Cat And Mouse: In Dallas, a woman is shot dead while sitting in her car. Detectives race to find her killer before the trail runs cold.
Senseless: A young man is found dead in a Kansas City apartment complex. With no apparent leads, homicide detectives turn to the victim's phone records in search of a clue to the killer.
Up in Smoke: A truck fire leads the police to the scene of a double murder in Memphis. In Kansas, a woman found dead in the street prompts an investigation where anyone could be a suspect.
In Detroit, a double shooting in a vacant lot leads Lt John Morell and Sgt LaNesha Jones to an unlikely suspect: a 61 year-old man.
Blood Trail: In Memphis, Tennessee, a woman is brutally stabbed and left for dead in the street.
In Miami, Ricardo John solves his first case as lead detective and Scott Sayers and Kenneth Penrod investigate a home invasion that left a man dead.
Detective Manny Castillo investigates a brutal double homicide. The key to the case could be a surviving third victim, who is clinging to life after being shot several times.