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.

Fame chasing killers David Berkowitz and Dennis Rader's motives are analyzed and ranked on Dr Michael Stone's scale of evil.

Seemingly ordinary people commit brutal crimes of passion. Sam Collins and Clara Harris snapped -- but people question if they are evil.

Known for diabolical brilliance, Ed Kemper and Ted Kaczynski's aptitude contributed to their brutal crimes. See who ranks higher on the scale of evil.

When mysterious acquaintances pursue a target, obsession takes root. See how these spurned killers rank on the scale of evil.

Charismatic leaders commit unspeakable acts by using one powerful weapon -- their influence. See how the most notorious American cult leaders rank on the scale of evil.

Some killers snap, while others carefully plan evil acts of vengeance. Revenge killers are analyzed and ranked on Dr. Stone's Scale of Evil.

Calculated acts of brutality are unleashed upon the most unsuspecting victims. See how manipulative murderers rank on the Scale of Evil.

Killers who feed on human beings are analyzed and ranked on the Scale of Evil.

Examining whether an ax murderer and a career criminal can find redemption. See how they place on the Scale of Evil.

Statistically women are far less common to commit acts of brutality, but their motives and methods can be every bit as cruel. See how they measure on the Scale of Evil.

Sometimes the most heinous acts are committed by those we trust most. Dr. Kris Mohandie ranks a notorious Black Widow after the mysterious murder of husband number three.

When a domineering ex-military man fears losing control over his family, he commits unspeakable acts of brutality. See how controlling killers rank on the Scale of Evil.

Some of the world's most notorious killers include men who fail to control their darkest impulses. See how sexual predators rank on the Scale of Evil.

For killers who attempt to mask their crimes, deception itself is just another weapon. See where diabolical schemers land on the Scale of Evil.

Many murderers possess narcissistic tendencies, but there is a unique group who are pathologically and dangerously self-obsessed.