Self - Criminal Psycologist, Walden University (7 episodes, 2019)
Self - Author, 'The Mind of a Murderer' (7 episodes, 2019)
Self - Criminologist, Professor Emeritus, Northeastern University, Boston (7 episodes, 2019)
Self - Author, 'Clues from Killers' (7 episodes, 2019)
Self - Narrator (7 episodes, 2019)
Self - True Crime Writer (6 episodes, 2019)
Self - Criminologist, University of Houston, Clear Lake / Self - Criminologist, University of Houston, Clearlake (6 episodes, 2019)
Self - Professor, Rhode Island College (5 episodes, 2019)
Self - Criminologist (5 episodes, 2019)
Self - Detective, Boulder County Sheriff's Office (3 episodes, 2019)
Self - Author, 'The Greatest Stories Never Told' (1 episode, 2019)
Self - Author, 'Murdered in Their Beds' (1 episode, 2019)
Self - Author, 'The Deadly Dozen: America's 12 Worst Serial Killers' (1 episode, 2019)
Albert Fish (1 episode, 2019)
Axeman (1 episode, 2019)