As of October 2015, no official announcement by Investigation Discovery exists concerning approval for the fourth season of the TV show “Most Evil." Three seasons of the show, constituting 38 episodes, have been broadcast. The show originally aired on Discovery Channel before then moving to Investigation Discovery.
“Most Evil” is a forensic TV program that focuses on rating murders on a scale of evil from one to 22 that forensic psychiatrist Michael Stone developed. The scale ranges from those who murder in self-defense to those who are serial torturer-murders. Stone presented the first two seasons of the show. For the third season of the show, forensic psychologist Dr. Kris Mohandie replaced Stone.