3 episodes
First episode: E1

Investigative journalist Maria Awes gets a call from serial killer Todd Kohlhepp, who claims that he has murdered more victims. She teams up with former FBI profiler John Douglas and Kohlhepp's biographer Gary Garrett, to unravel the truth.
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3 episodes
First episode: E1Quick answers about this series, release status, and episode totals.
Serial Killer: Devil Unchained first aired on July 22, 2019.
Serial Killer: Devil Unchained currently has 1 season and 3 episodes.
Serial Killer: Devil Unchained is ended, and no upcoming episode is currently scheduled.