What happens when a jealous lover turns into an enraged killer? From impulsive crimes of passion to a terrifying revenge crime spree, Dr. Stone unravels how the psychology of love can become the psychology of murder.

What happens when delusion, obsession, and jealousy collide? What can explain this relentless drive, and what triggers violence in the mind of a stalker? Neuro-psychology is explored on the cases of four notorious stalkers.

Delusional minds are profiled using cutting-edge science that may finally reveal the neurological cause of schizophrenia.

Dr. Stone's scale of evil has decoded the complex psychology of the country's most notorious criminals. But can it be used to reveal new clues for unsolved crimes?

Dr. Stone unearths the psychology of persuasion to learn why cult members can become active participants in evil.

From Charles Whitman, the Texas clock tower sniper, to Charles Starkweather, the real Natural Born Killer, science reveals new clues into the psychology behind these seemingly senseless crimes. What links these acts of evil?

With groundbreaking science on the origins of malignant narcissism, Dr. Stone profiles murderers whose need for glory and control led them to incredible evil to see what causes some people to choose murder as a means to notoriety.

What lies at the intersection of evil and intelligence? Dr. Stone, armed with new scientific discoveries on early brain development, analyzes Kemper, Kaczynski, and Kraft to find out what made these killers' use their cunning for crime.

Dr. Stone probes the science of revenge to profile revenge killers, looking for clues that might shed light on their motives.

Dr Stone analyzes three of the 20th century's most deadly cult leaders.