Monster Men: Armed with his trademark treble hook, Willie Edwards returns to the swamps, only to be confronted with the biggest monster he's ever seen. (S7, ep 5)

Home Turf: Despite help from the Edgars, Troy is still behind on his tag count and must pull out all the stops if he wants to tag out. (S7, ep 4)

Last Dance: A look at how Virginia detectives used science and cunning to catch the killer of 16-year-old ballet dancer Meghan Landowski in 2008. (S7, ep 4)

Death and Taxes: A look at how police solved the murder of 58-year-old tax attorney Ashley Pollow, who was strangled and burned at his Florida home in December 2010. (S7, ep 3)

Deadly Accusation: When Virginia Beach detectives were called to the scene of a bloody double homicide in May 1996, they uncovered a murder plot too strange to believe. (S7, ep 2)

Murder in the Mirror: The crime documentary series returns with a look at the brutal 2006 murder of 80-year-old grandmother Bernita 'Billie' Cunningham. (S7, ep 1)

Little Girl Gone: The 1988 case of a missing nine-year-old girl went cold until an encounter at a bus stop breathed new life into the investigation and revealed the truth. (S7, ep 12)

Nightmare Field: Investigators search for 23-year-old Dalene Carlson after she is reported missing. But then a tractor operator makes a gruesome discovery in a cornfield. (S7, ep 11)

Flames In Paradise: Detectives encounter a rogue's gallery of suspects and outlandish leads on their way to finding the killer of telemarketing manager David Stevens. (S7, ep 10)

Left Alone: When 13-year-old Mollie Pittman is attacked and murdered in her friend's Orlando home, investigators are left with absolutely no clues to the killer's identity. (S7, ep 9)