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