• 
  Chris Wilson

  2 episodes, 2018
• 
  Fred Dinenage

  19 episodes, 2017-2018
• 
  Geoffrey Wansell

  15 episodes, 2017-2018
• 
  Elizabeth Yardley

  19 episodes, 2017-2018
• 
  Jason Christopher

  1 episode, 2017
• 
  Jayme Swiftt

  1 episode, 2017
• 
  Gemma Wilks

  1 episode, 2017
• 
  Jack Gover

  1 episode, 2017

• 
  Natalia Marie

  1 episode, 2017
• 
  Paul McTaggart

  1 episode, 2017
• 
  Katey Roberts

  1 episode, 2017
• 
  Richard Cooper

  1 episode, 2017
• 
  Mark Spayne

  1 episode, 2017
• 
  Freya Golding

  1 episode, 2017
• 
  Jason Lines

  1 episode, 2017

• 
  Karina Kinga Kiss

  1 episode, 2017
• 
  Craig Buckingham

  1 episode, 2017
• 
  Rob Vowles

  1 episode, 2017
• 
  Kathryn Mincer

  1 episode, 2017
• 
  Selina Black

  1 episode, 2017
• 
  Swaylee Loughnane

  1 episode
• 
  John Byrne

  1 episode, 2017
• 
  Callum Horncastle

  1 episode, 2018
• 
  James Campbell-Warner

  1 episode, 2017
• 
  Colin Blyth

  1 episode, 2017
• 
  Nicholas Pearce

  1 episode, 2017
• 
  Rebecca Holbourn

  1 episode, 2017
• 
  Frankie Payne

  1 episode, 2017
• 
  Chris Carter

  7 episodes, 2018
• 
  Stuart Hamilton

  12 episodes, 2017-2018
• 
  Rex Beaber

  Self - Forensic Psychologist
• 
  Duncan Campbell

  Self - Crime Writer
• 
  Martin Brunt

  Self - Sky News Crime Correspondent
• 
  Jeremy Thompson

  Self - Former News Anchor
• 
  Ross Huguet

  Self - Narrator (US version)
• 
  Jonathan Cann

  Judge
• 
  Tony Merritt

  Constable Robert Hydes
• 
  Jane Carter Woodrow

  Self - Author, 'After Evil'
• 
  Robert Phipps

  Self - Body Language Expert
• 
  Patricia Wiltshire

  Self - Forensic Ecologist
• 
  Karim Khalil

  Self - Barrister
• 
  Alan Doney

  Reconstruction Actor
• 
  Louis B. Schlesinger

  Self
• 
  Tom Wood

  Self - Former Deputy Chief Constable, Lothian & Borders Police
• 
  Claire Hayhurst

  Self - Reporter