Season 4

1.The Ken and Barbie Killers Part 1: Dead Ringer

2.The Ken and Barbie Killers Part 2: I Kidnapped A Girl

3.The Back To School Killer Part 1: A Fear in the Air

4.The Back To School Killer Part 2: A Fear in the Air

5.Sammy The Bull Gravano Part 1

6.Sammy The Bull Gravano Part 2

7.The Hillside Stranglers Part 1: A Pair of Serial Killers

8.The Hillside Stranglers Part 2: She Walked Into the Trap

9.The Cross Country Killer Part 1: He Could Make People Disappear

10.The Cross Country Killer Part 2: The Kill Kits

11.John Gotti Part 1: It Was Kill or Be Killed

12.John Gotti Part 2: There Were Fatal Consequences