This harrowing half-hour archive series revisits some of the most brutal killers in modern history, reviewing news footage and the words of the killers themselves to see which terrifying traits each killer exhibited. What are the signs...of evil?
Network
Investigation DiscoveryStatus
Returning Series
SeasonsSeen 0 of 116 episodes
- 9 episodes · 2020Mark season watched
- 6 episodes · 2021Mark season watched
- 7 episodes · 2021Mark season watched
- 10 episodes · 2022Mark season watched
- 11 episodes · 2023Mark season watched
- 10 episodes · 2023Mark season watched
- 9 episodes · 2024Mark season watched
- 10 episodes · 2024Mark season watched
- 10 episodes · 2025Mark season watched
- 15 episodes · 2025Mark season watched
- 19 episodes · 2026Mark season watched
| Actor | Role |
|---|---|
| NN.G. BerrillPsychologist | Psychologist |