• S1.E1 ∙ John Wayne Gacy: Evil Secret Part 1
• S1.E2 ∙ John Wayne Gacy: Evil Secret Part 2
• S1.E3 ∙ Charles Manson: The Devil's Work Part 1
• S1.E4 ∙ Charles Manson: The Devil's Work Part 2
• S1.E5 ∙ NorCal Rapist: Phantom Predator Part 1
• S1.E6 ∙ NorCal Rapist: Phantom Predator Part 2
• S1.E7 ∙ Aileen Wuornos: Monster Made - Part 1
• S1.E8 ∙ Aileen Wuornos: Monster Made Part 2
• S1.E9 ∙ Zodiac Killer: I Am the Zodiac Part 1
• S1.E10 ∙ Zodiac Killer: I Am the Zodiac Part 2
• S1.E11 ∙ Jim Jones: Unholy Massacre Part 1
• S1.E12 ∙ Jim Jones: Unholy Massacre Part 2

• S2.E1 ∙ Son of Sam Part 1: The Duke of Death
• S2.E2 ∙ Son of Sam Part 2: I Am A Monster
• S2.E3 ∙ BTK Part 1: Bind, Torture, Kill
• S2.E4 ∙ BTK Part 2: The Taunting
• S2.E5 ∙ The Night Stalker, Part 1: Summer of Terror
• S2.E6 ∙ The Night Stalker, Part 2: I Will Be Avenged
• S2.E7 ∙ The Co-ed Killer Part 1: The Murder Capital of the World
• S2.E8 ∙ The Co-ed Killer Part 2: Thinking Murder All Day Long
• S2.E9 ∙ Robert Durst Part 1: World's Worst Fugitive
• S2.E10 ∙ Robert Durst Part 2: Nobody Tells the Whole Truth
• S2.E11 ∙ Dr. Death Part 1: A License to Kill
• S2.E12 ∙ Dr. Death Part 2: You're Next

• S3.E1 ∙ The Golden State Killer: Hunting Human Beings Pt. 1
• S3.E2 ∙ The Golden State Killer: Hiding in Plain Sight Pt. 2
• S3.E3 ∙ The Butcher Baker: Terror in the Wilderness Pt. 1
• S3.E4 ∙ The Butcher Baker: The Girls Who Got Away Pt. 2
• S3.E5 ∙ The Amityville Horror: Murdered One by One Pt. 1
• S3.E6 ∙ The Amityville Horror: Evil in the House Pt. 2
• S3.E7 ∙ The Dating Game Killer: Smooth Talker Pt. 1
• S3.E8 ∙ The Dating Game Killer: The Bite Mark Pt. 2
• S3.E9 ∙ The Iceman: The Murder Business Pt. 1
• S3.E10 ∙ The Iceman: Trapping a Serial Killer Pt. 2
• S3.E11 ∙ The Firestarter: A Wall of Flames Pt. 1
• S3.E12 ∙ The Firestarter: Chasing a Pyromaniac Pt. 2

• S4.E1 ∙ The Ken and Barbie Killers: Dead Ringer - Part 1
• S4.E2 ∙ The Ken and Barbie Killers: I Kidnapped a Girl - Part 2
• S4.E3 ∙ The Back to School Killer: A Fear in the Air - Part 1
• S4.E4 ∙ The Back to School Killer: Portrait of a Predator - Part 2
• S4.E5 ∙ Sammy "The Bull" Gravano: Part 1
• S4.E6 ∙ Sammy "The Bull" Gravano: Part 2
• S4.E7 ∙ The Hillside Stranglers: A Pair of Serial Killers - Part 1
• S4.E8 ∙ The Hillside Stranglers: She Walked Into the Trap - Part 2
• S4.E9 ∙ The Cross Country Killer: He Could Make People Disappear - Part 1
• S4.E10 ∙ The Cross Country Killer: The Kill Kits - Part 2
• S4.E11 ∙ John Gotti: It Was Kill or Be Killed - Part 1
• S4.E12 ∙ John Gotti: There Were Fatal Consequences - Part 2

• S5.E1 ∙ The Trailside Killer: Part 1
• S5.E2 ∙ The Trailside Killer: Part 2
• S5.E3 ∙ The Slave Master: Part 1
• S5.E4 ∙ The Slave Master: Part 2
• S5.E5 ∙ The Twin: Part 1
• S5.E6 ∙ The Twin: Part 2
• S5.E7 ∙ The Times Square Killer: Part 1
• S5.E8 ∙ The Times Square Killer: Part 2
• S5.E9 ∙ The Black Widow: Part 1
• S5.E10 ∙ The Black Widow: Part 2
• S5.E11 ∙ The Happy Face Killer: Part 1
• S5.E12 ∙ The Happy Face Killer: Part 2