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? | Documentary, Crime | 2 Seasons | 19 Episodes | Series Premiere: Feb 25, 2024 | Last/Latest Episode: S08 E10 on Jul 7, 2024