On a snowy winter evening in 1982, 21-year-old Mary Brown accepted a ride from a handsome stranger in the resort town of Breckenridge, Colorado. The trip ended with her brutally beaten and raped. Mary survived, but her predator's violence had only just begun. After 10 years in prison, Tom Luther was released a far more vicious criminal. Soon, from the Rockies to West Virginia, like Ted Bundy, Luther enticed a chain of women into his murderous trap.

For years he'd stalked elementary schools and playground looking for young girls from low-income neighborhoods to abduct, rape and murder. He thought of them as "throwaway kids" - hardly missed, and soon forgotten, except by those who loved them. He was ever parent's worst nightmare. The bogeyman they warned their children about ... the fiend who lurked outside bedroom windows.

In April 1997, pretty, 22-year-old Jacine Gielinski stopped her car at a red light in Colorado Springs, Colorado. She had no idea that the two young men looking at her from the car next to hers would in that moment decide she would be their target for unspeakable horrors.

No Stone Unturned recreates the genesis of NecroSearch International: a small ,eclectic group of scientists and law enforcement personal, active and retired, who volunteer their services to help locate the clandestine graves of murder victims and recover the remains and evidence to assist with the apprehension and conviction of the killers.

Face-to-face with some of America's most terrifying killers, FBI veteran and ex-Army CID colonel Robert Ressler learned from them how to identify the unknown monsters who walk among us - and put them behind bars. Now the man who coined the phrase "serial killer" and advised Thomas Harris on The Silence of the Lambs shows how he has tracked down some of the nation's most brutal murderers. Join Ressler as he takes you on the hunt for America's most dangerous psychopaths. It is a terrifying journey you will not forget.