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)

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)

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)

Murder in Room 348: When business traveller Greg Fleniken is found dead in his hotel room, all signs point to a heart attack. But police soon realise he has been murdered. (S6, ep 4)

Death of Innocence: Kenny Conrick was just eight years old when he was abducted and murdered in Gary, Indiana in 1979. Who would want this innocent child dead? (S6, ep 3)

Vanished in Reno: When a young university student is abducted from a friend's home in the middle of the night, the city of Reno, Nevada lives in fear of who might be next. (S6, ep 2)

Wicked Impulse: In 1997, a California mountain town is stunned by the murder of a longtime resident. Months of dogged investigation bring the case to a shocking conclusion. (S6, ep 1)

Nightclub Nightmare: When a robbery at a popular Texas nightclub leaves one dead and two critically wounded, investigators are in a race against time to catch the killer. (S6, ep 12)

Dead End Trail: Fear grips the students of Southern Illinois University when the body of senior Susan Schumake is discovered near a popular campus trail. (S6, ep 11)

Sinister Secret: In rural Wyoming, a young teen is found strangled after vanishing from her group home. Relentless investigation reveals the killer's shocking identity. (S6, ep 10)