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.
The Boogie Man: Dallas detectives investigating a murder uncover disturbing facts about the victim's dangerous lifestyle. (S4, ep 3)
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)
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.
Inner Demons/Kids With Guns: Miami detectives uncover shocking secrets about a man murdered outside his own apartment. (S4, ep 2)
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 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.
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)
Drilling Down on Season 4: Rick, Marty and the Oak Island team meet up with Matty Blake to reveal new discoveries and discuss future plans.
Amazing Discoveries: It's the moment of truth for the fellowship of the dig, as the guys are faced with the burning question as to whether they should quit or continue. (S5, ep 16)