Most Evil

The killers who deceive are twice as evil. Dr Stone considers these killers in two ways: the more wicked the crime and the more premeditated the deceit, the higher they are placed on his scale. It's not just what they do, but how they try to cover up.

The most notorious killers: Bundy, Gacy, Ridgway, Sells -- they've claimed hundreds of victims and share one thing in common -- they are all psychopaths. We will travel back to reveal startling evidence and come face to face with them.

Over 90 percent of murders are committed by men. But what motivates the women who are driven to kill? Most women who do kill, murder those closest to them. Find the striking difference between men and women killers.

We probe the physiology of love and the look at the power of authority as we unravel the motive and methods of some of the most notorious accomplice killers. The secrets of these evil partnerships are revealed.

What lies in the mind of the psycho killers? In each case, they claim they are unaware of what's real or imagined. To understand their atrocities, we will examine the real science of psychosis and meet one of these killers face to face.

Engineers of the most diabolical plots, killers with the most deviant desires -- Dr. Stone explores the murderous world of these deviant killers to find out how their desires form and what drives them to carry out their fantasies.

Using shocking examples of brutal crime, the science of evil explores whether killers are forged in abusive homes or whether there are some people actually wired to be cold-blooded.

From the denials of a convicted child molester to the frank admission of a killer claiming 70 lives, a human voice emerges from the chaos and violence. To prevent violent crime, it is necessary to understand it, and this hour brings it into sharp focus.