S01 E05 — The Jehovah Jinx
The police encounter a bizarre murder case while investigating a deadly home invasion in which Jehovah's Witness Pam Candelario's body is found at the scene and her husband Ralph is brutally beaten.

S01 E04 — The Second Shot
When Dianne Hood is gunned down outside a community center in Prison Valley, no one can understand why anyone would want to murder the well-liked housewife; the answer involves betrayal, greed and obsession, in an infamous love-triangle murder plot.

S01 E01 — The Kill List
Prison Valley is rocked by the murder of Prisons Chief Tom Clements; the police think it's part of a wider plot, including the death of pizza delivery man Nathan Leon, and they're running out of time to catch the killer.

S03 E01 — I Am Strange
A lone gunman shoots a young man and woman on their way home from the gym where they work; while interrogating a suspect, detectives learn that this is no random attack but the twisted plan of a deranged psychopathic stalker.

S03 E06 — I'm Just a Sick Murderer
An officer responds to a 911 call placed by a robber on the lam who feels compelled to turn himself in; when the officer arrives at the scene, the criminal confesses to much more than breaking and entering.

S02 E04 — Diary of a Psychopath
A college student disappears at the start of his freshman year without a trace, leaving his family and his girlfriend reeling; when authorities look to his best friend for answers, they uncover a love triangle gone wrong.

S02 E02 — Fantasy Over Family
A troubled 29-year-old son is kicked out of his parents' house after spending the family fortune on a webcam model; his mother, father and brother are found murdered, the young man insists he's innocent.

S04 E02 — Sleeping Beauties
First responders arrive at a home in Ontario, where a mother leads officers to the dead bodies of her two children; an investigation yields a twisted truth: this tragedy isn't an accident but a carefully crafted killing by a vengeful psychopath.

S04 E08 — I Call Him Monster
Police respond to the site of a fiery car crash alongside a Michigan highway, where they discover the badly burned body of a young woman; investigators quickly realize this is no accident but a cold-blooded murder plot.

S03 E03 — Do Her Mortal Harm
The naked and mutilated body of a mother turns up at the bottom of a ravine in Baton Rouge, La.; when tire tracks lead investigators to a suspect, they encounter an undetected serial killer who confesses to butchering eight women over a decade.

S03 E04 — I Killed Him. Boom. Boom.
Police respond to a 911 call to find a father dead in his home with more than 15 gunshot wounds.

S39 E25 — Jade Colvin Is Missing
Photos discovered on an old cell phone help solve the disappearance of a 14-year-old girl.

S11 E18 — Evilness Inside My Head
Revisiting some of the most dangerous killers in modern history to see which psychopathic traits they exhibited.

S11 E19 — That's When My Nightmare Started
A small SD card contains horrifying images and videos of a woman's murder; when someone gives it to Anchorage police, detectives come face-to-face with a sexual psychopath who has a shocking tale to tell.

S02 E08 — Love and Rage
Yeardley Love is days from graduation when her UVA lacrosse player boyfriend, George Huguely, breaks into her room and kills her; Elizabeth Chambers examines the warning signs, missed intervention, and the legacy her family builds from tragedy.

S02 E08 — To Live and Die in Hotlanta
Bridget Shiel, a 19-year-old escort and rap video dancer, meets a brutal end in 2016 when someone shoots her and leaves her naked in an Atlanta park.

S11 E18 — Evilness Inside My Head
Revisiting some of the most dangerous killers in modern history to see which psychopathic traits they exhibited.

S11 E19 — That's When My Nightmare Started
A small SD card contains horrifying images and videos of a woman's murder; when someone gives it to Anchorage police, detectives come face-to-face with a sexual psychopath who has a shocking tale to tell.

S02 E08 — Love and Rage
Yeardley Love is days from graduation when her UVA lacrosse player boyfriend, George Huguely, breaks into her room and kills her; Elizabeth Chambers examines the warning signs, missed intervention, and the legacy her family builds from tragedy.

S02 E08 — To Live and Die in Hotlanta
Bridget Shiel, a 19-year-old escort and rap video dancer, meets a brutal end in 2016 when someone shoots her and leaves her naked in an Atlanta park.

S39 E25 — Jade Colvin Is Missing
Photos discovered on an old cell phone help solve the disappearance of a 14-year-old girl.

S03 E01 — Last Dance
Fresh from a breakup, a Playboy casting assistant revels in the L.A. nightlife scene until a wild night out ends in her mysterious death.

S03 E04 — The Doctor and the Bunny
As a Playboy Bunny, Jackie Hendrickson is forbidden from fraternizing with her customers; Atlanta plastic surgeon Dr. Warren Brown is impossible to resist, and their illicit affair sets off a deadly chain of events.

S02 E02 — Mother Gone Missing
Thirty-two-year-old Becky Brosnan goes missing; while a Myspace message says she's left to find herself, everyone says Becky would never abandon her children; now, detectives must piece together Becky's life to uncover what really happened to her.

S02 E08 — Death on the Highway
Twenty-eight-year-old Michael Sandy is an interior designer living in Williamsburg, Brooklyn; Michael loves music and making new friends on the internet; but his habit of trusting strangers he meets on the web will put his life in jeopardy.

S02 E07 — New Year's Nightmare
Mikarah Sanders is shot in a home invasion on New Year's Eve; police dive into Sanders' digital world, learning that the killer has been under their noses all along, driven by rage to commit a shocking crime of passion.

S02 E01 — Ultimate Betrayal
A couple returns home from a trip to find blood everywhere, signs of struggle and their teenage daughter missing; police stumble across her charred remains in the desert; digital clues soon lead police to a shocking secret and a deadly betrayal.

S02 E10 — When All Else Fails
After her home is invaded and her husband murdered, Shaunna Dodd recounts her harrowing ordeal at gunpoint; however, when investigators dig deeper, they uncover a tale of lies, infidelity and shady characters who have wandered into the Washoe Valley.

S02 E06 — Control Freak
Donna Scrivo hasn't seen her adult son, Ramsay, in days, and she's worried; she alerts the police, but days pass with no sign of him anywhere; then the discovery of a severed head and body parts along a highway reveals an act of shocking violence.

S02 E09 — Murder Is No Accident
After Cynthia Roth drowns in the middle of a crowded lake, investigators uncover a decades-long trail of terror; detectives must take extraordinary measures to catch the killer.