Most Evil is an American forensics television program on Investigation Discovery, first aired in 2006, presented by forensic psychiatrist Dr. Michael H. Stone of Columbia University during the program's first three seasons, and by forensic psychologist Dr. Kris Mohandie during its fourth season. On the show, the presenter rates murderers on a scale of evil that Stone himself has developed. The show features profiles on various murderers, serial killers, and mass murderers of various degrees of psychopathy. The series initially ran for three season, from 2006 to 2008, and was later revived for a fourth season, from 2014 to 2015.