Revisiting some of the most dangerous killers in modern history to see which psychopathic traits they exhibited. Understanding whether it is possible to identify psychopaths before it is too late.
S4 E1: It Was A Frenzy
A teenager is arrested after his mother finds the body parts of a missing drifter in his bedroom. Police uncover that the suspect idolises infamous serial killers.
S4 E2: Family Comes First
On Halloween, 11 operators receive a chilling call from a teenager claiming he killed his parents. Police race to the scene and discover a burgeoning psychopath.
S4 E13: I Slept With A Knife
An 18-year-old man is reported missing in North Dakota. Witnesses lead police to a young man with a history of violence, who didn't work alone.
S1 E1: Chase Me
When a 50-year-old woman is found dead in her home, all that's left behind is a note that reads, "Chase me." Police search relentlessly for the remorseless psychopath.
S1 E2: Into the Woods at Midnight
Three locals are found brutally murdered in a quaint village in Maine. The killer leads detectives into the woods, where he buried his fourth victim.
S1 E3: I'm Not the Monster I Was
12 years after murdering his friend, a 26-year-old man requests a reduced sentence. Has he really changed, or is he still capable of cold-blooded murder?
S1 E4: Where Evil Grows
A charming 20-year-old asks to help authorities with a murder investigation. He claims to have met one of the three victims, but detectives suspect otherwise.
S1 E5: I Am The Devil
In Colorado, a missing woman's roommate claims she'll do anything to help find her. Investigators fear they may have a rare female psychopath on their hands.
S1 E6: I Dug a Hole and Said a Prayer
A pregnant woman and her 7-year-old son suddenly disappear. When police question her ex-lover, they suspect he is capable of violence.
S1 E7: I Could Hear Her Calling My Name
When a girl disappears after school, her last known steps are caught on CCTV. The footage leads detectives to two dark minds and a sinister crime.
S1 E8: Now They Lay Me Down To Sleep - Part 1
A death row inmate grants a final interview weeks before his execution. In his final days, does the convicted murderer show signs of remorse?
S1 E9: Now They Lay Me Down - Part 2
Death row inmate John Hummel agrees to a final interview weeks before his execution.
S1 E10: Only If There's Something
While being questioned on the abduction of a barista, a local businessman makes a deal with police to reveal a secret life as a serial killer.
S1 E11: Guess I've Got No Conscience
A woman's body is found strangled near a country road. Investigators learn the suspect is a prolific serial killer who raped and murdered eight women.
S1 E12: I Have a Surprise for You
A woman arrives at her parents' house to find them bleeding on the floor. Police uncover the shocking truth and confront a cunning teenage psychopath.
S2 E1: I Didn't Do Anything
A married woman believes she's committed the perfect crime. She doesn't know how wrong she is.
S2 E2: Fantasy Over Family
A man's obsession with a web-cam model leads to the brutal murders of an innocent family.
S2 E3: I Call Him Monster
A blazing car accident on a Michigan highway turns out to be the result of a devious murder plot.
S2 E4: Diary Of A Psychopath
A student disappears, and police stumble upon a dangerous love triangle involving best friends.
S2 E5: Sleeping Beauties
A mother claims not to know how her children died. An investigation reveals the tragedy isn't an accident but a carefully crafted killing by a vengeful psychopath.
S2 E6: The Good Girl
Psychopaths reveal themselves through tell-tale signs and their own words.
S2 E7: I'm Just A Sick Murderer
A robber who feels compelled to turn himself in, calls 911. But when officers arrive at the scene, he confesses to much more than breaking and entering.
S2 E8: You Met The Angel Of Death
S2 E9: I Am Strange
A gunman shoots a young man and woman on their way home from work. Detectives learn that this is no random attack but the twisted plan of a psychopathic stalker.
S2 E10: Sometimes People Get Shot
A 17-year-old takes a deadly road trip that exposes the inner psychopath lurking within.
S2 E12: God Was Going To Use Me
A nurse confesses the horrors she routinely inflicted on numerous elderly patients in Canada.
S2 E13: I Was A Star
An Orlando, Florida, man fakes psychosis to avoid responsibility for killing his ex-girlfriend.
S2 E14: I Knew She Lived Alone
A Burlington Township, New Jersey, man kills his girlfriend, but he reveals she is not his first victim.
S2 E15: I Killed Him. Boom. Boom.
Police find a father of two dead in his home with over 15 gunshot wounds. They question the family, but one person is missing, his mother-in-law.
S2 E16: Do Her Mortal Harm
S2 E17: Everyone Has A Death Sentence
A sadistic "Tourniquet Killer" terrorises young girls in Texas. He confesses to multiple murders and grants one final interview before his execution.
S2 E18: He Is Not Among The Living
A fractured relationship turns dark and deadly when one man seeks revenge on his ex-girlfriend's new love.
S2 E20: Most People Would Be Haunted
A failed actor's killing spree becomes fodder for his police interrogation performance.
S3 E1: Ladies First
When a beloved elderly couple disappears, detectives discover their son not only lived off their charity but also took sadistic pleasure in murdering them.
S3 E2: I Was In A Zone
A crash on a North Dakota highway leaves one passenger dead but the driver unscathed. When police investigate, they quickly suspect foul play.
S3 E3: I Wanted Her To Hear It
A man finds his girlfriend and her mother murdered in their beds at night. He calls 911 for help – but police discover his urge to seek revenge.
S3 E5: I’m A Sick Puppy
When a priest from Florida vanishes, police focus on a troubled ex-convict he was helping. A psychopathic killer reveals a twisted vengeance that led to murder.
S3 E6: I Guess My Life Is Over Now
A mother is found dead after reporting her son to the police. When he turns himself in, his confession isn’t just cold-hearted, it’s psychopathic.
S3 E7: Heat Will Destroy
After his conviction for brutally slaying his wife, a Florida inmate says he has killed another woman, revealing he’s a psychopath with a history of violence.
S3 E8: It Wanted To Kill Somebody
A missing woman’s brutally beaten body is found in a dilapidated house near her home. The case goes cold until a local teen makes a sickening claim.
S3 E9: Hell To Look Forward To
A man confesses he "accidentally" killed his best friend while cleaning his gun. During his interrogation, he admits to police he's a serial killer.
S3 E10: In My Van, I'm The Aggressor
Omaha police officers chase down a stolen vehicle driving recklessly. The driver subsequently confesses to a gruesome murder of a local woman.
S3 E11: How To Spot A Psychopath
The signs of psychopathy lurk in all humans - grandiosity, sadism, superficial charm, manipulation, lack of empathy, or having a parasitic lifestyle.
S3 E12: Deadly Women
When women kill, it can be extremely shocking. Experts explore the unique characteristics of female psychopathic killers and explore their horrifying crimes.
S3 E13: He Thought We Were Buddies
A dying man uses his last breath to tell 911 the friend who stabbed him is, "the angel of death. Police uncover a story of deception, jealousy and rage.
S3 E14: I Still Care About Her
A killer shoots a young woman dead in her boyfriend's Orlando apartment. Hours later, he turns up in a hospital bed 500 miles away with a gunshot wound.
S3 E15: He Didn't Know I Was There
A gunman shoots a man dead as he runs along a country road. A witness tells police a bizarre story, and detectives unravel the lies of a psychopath.
S3 E16: Something A Man Would Do
A woman finds her brother dead in his bedroom with his throat slashed. The individual responsible is a manipulative psychopath who craftily deflects blame.
S3 E17: Having Breakfast On Him
Investigators search a farm for a missing man and find human remains. The owner admits that her pigs ate her tenant alive, and he's not the only victim.
S3 E18: Hey Look, I'm A Serial Killer
A racially motivated serial killer, who targeted civil rights leader Vernon Jordan and pornography publisher Larry Flynt, confesses to further murders.
S3 E19: Kids Will Be Kids
Police find a 17-year-old female's dead body in a ditch with two gunshot wounds. Detectives uncover it was a thrill kill carried out by the victim's friends.
S3 E20: An Excuse To Kill Somebody
A New Hampshire town reels after police arrest four teenagers for robbing and murdering a 42-year-old mother and maiming her 11-year-old daughter.
S3 E21: This Is What I Chose To Be
A missing person's report leads police to a psychopath who lures women into a deadly world of sexual exploitation.
S4 E3: Monster Has Always Been There
A 911 operator receives a distressing call from a troubled culinary student after he murders his classmate's family in their sleep.
S4 E4: I'm Not Your Typical Murderer
A frantic student calls 911 to say she shot her boyfriend in self-defence. Police soon discover they are face-to-face with a remorseless psychopath.
S4 E5: He Had It Coming
A 24-year-old man falls under the spell of a 47-year-old widow. Detectives discover she's a sexual psychopath who has claimed the lives of more than one admirer.
S4 E6: I'm Telling You I'm Dangerous
In rural Missouri, police respond to a haunting call from a 50-year-old man. Detectives face an impulsive massacre and a controlling killer.
S4 E7: I Am The Weirdest Guy
A woman awakens to find her two young sons with their throats cut. Their aunt's boyfriend confesses to his mother, and she wears a wire to capture her son.
S4 E8: Make Sure You Get My Good Side
A road rage incident turns deadly as an elderly man is beaten to death by a psychopathic teenager who claims he was acting in self-defence.
S4 E9: Unorthodox And Weird
When a 19-year-old Colorado woman vanishes, the suspect is her troubled former classmate who has a past filled with homicidal urges toward women.
S4 E10: His Parents Didn't Like Me
A man finds his family slaughtered in their home. Police discover the oldest son, 16-year-old Gavin Smith, killed them so he could see his girlfriend.
S4 E11: Ties That Bind
Experts delve into disturbing cases of psychopathic killers known as "family annihilators," who see family members as simply potential victims.
S4 E12: Birth Of A Psychopath
Experts examine the early warning signs in psychopathic killers apprehended as teens and young adults, a parent's worst nightmare.
S4 E14: I Love Something So I Kill It
A mother finds her son horrifically dismembered in her basement. The suspect is the victim's ex-girlfriend, found with blood on her hands.
S4 E15: I Knew You Was Gonna Die
A mother vanishes after meeting with her divorce attorney and estranged husband. A psychopathic game of cat and mouse with investigators ensues.
S4 E16: My Pretty White Shoelaces
Hikers in Portland discover the decomposed body of a strangled young girl. A month later, another woman turns up brutally murdered in same fashion.
S4 E17: You're Not Leaving
A 33-year-old calls 911 to report his girlfriend missing. A failed polygraph test leads detectives to suspect that he might be hiding something.
S4 E18: She Said She Didn't Care
Martine Bernard's family reports her missing while she is six months pregnant. Days later, her father also vanishes. Is her husband responsible?
S4 E19: I'm Not A Weirdo
When a grandmother doesn't return home from her morning walk, police uncover that the man responsible for her disappearance is a pathological liar.
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