• 
  Ross Huguet

  14 episodes, 2018
• 
  Fred Dinenage

  9 episodes, 2018
• 
  Elizabeth Yardley

  9 episodes, 2018
• 
  Geoffrey Wansell

  8 episodes, 2018
• 
  Stuart Hamilton

  6 episodes, 2018
• 
  Rex Beaber

  Self - Forensic Psychologist
• 
  Bobby Chacon

  Self - FBI Special Agent, 1987-2014
• 
  Stephan Harbort

  Self - Criminologist

• 
  Harold Schechter

  Self - Author, The Serial Killer Files
• 
  Helen Morrison

  Self - Forensic Psychologist
• 
  Chris Carter

  Self - Best-Selling Author & Former Criminal Psychologist
• 
  Geoffrey Osborne

  Police Officer
• 
  Daniel Ryves

  Police Officer
• 
  Lars Larson

  Self - Talk Show Host & Journalist
• 
  Katherine Ramsland

  Self - Forensic Psychologist

• 
  Brian Jarvis

  Self - Former Detective Sergeant, Marion County Sheriff's Office
• 
  Jonathan Abbott

  Belgium Detective
• 
  Tom Driver

  Frank Worden