E1 - John Wayne Gacy: Evil Secret, Part 1

Aired: March 17, 2019

This is the shocking and gruesome mystery of John Wayne Gacy, a popular Chicago businessman and part-time clown who was leading a double life in the 1970s. By day he was a community leader and by night a predator of young men.

E2 - John Wayne Gacy: Evil Secret, Part 2

Aired: March 17, 2019

In Chicago, community leader and part-time clown John Wayne Gacy leads a double life, transforming into a monster who preys on male teenagers and becomes the most prolific serial killer of his day.

E3 - Charles Manson: The Devil's Work, Part 1

Aired: March 24, 2019

Charles Manson is a violent predator who has powers of persuasion that make it possible for him to convince his hippie followers to brutally murder innocent strangers

E4 - Charles Manson: The Devil's Work, Part 2

Aired: March 24, 2019

Charles Manson is a violent predator who has powers of persuasion that make it possible for him to convince his hippie followers to brutally murder innocent strangers

E5 - NorCal Rapist: Phantom Predator, Part 1

Aired: March 31, 2019

In Northern California, a masked predator meticulously plans his sexual assaults by studying the habits and routines of his female prey; after 27 years on the loose, police close in on the man they believe to be the NorCal Rapist.

E6 - NorCal Rapist: Phantom Predator, Part 2

Aired: March 31, 2019

In Northern California, a masked predator meticulously plans his sexual assaults by studying the habits and routines of his female prey; after 27 years on the loose, police close in on the man they believe to be the NorCal Rapist.

E7 - Aileen Wuornos: Monster Made, Part 1

Aired: April 07, 2019

A look at the deal makers and hangers-on who attached themselves to Aileen Wuornos, who is known as America's first female serial killer.

E8 - Aileen Wuornos: Monster Made, Part 2

Aired: April 07, 2019

A look at the deal makers and hangers-on who attached themselves to Aileen Wuornos, who is known as America's first female serial killer.

E9 - Zodiac Killer: I Am the Zodiac, Part 1

Aired: April 14, 2019

The Zodiac Killer terrorizes Northern California in the late 1960s; he taunts the public with cryptic clues, threats of violence and ciphers that are supposed to lead to his identity, but mostly go nowhere.

E10 - Zodiac Killer: I Am the Zodiac, Part 2

Aired: April 14, 2019

The Zodiac Killer terrorizes Northern California in the late 1960s; he taunts the public with cryptic clues, threats of violence and ciphers that are supposed to lead to his identity, but mostly go nowhere.

E11 - Jim Jones: Unholy Massacre, Part 1

Aired: April 21, 2019

More than 900 Americans died in an isolated jungle in northern Guyana in November 1978; Jim Jones has gone down in history as a madman who drove his followers to suicide, but the truth is more complicated and tragic than that.

E12 - Jim Jones: Unholy Massacre, Part 2

Aired: April 21, 2019

More than 900 Americans died in an isolated jungle in northern Guyana in November 1978; Jim Jones has gone down in history as a madman who drove his followers to suicide, but the truth is more complicated and tragic than that.