Self - Criminologist (9 episodes, 2016-2019)
Self - General Practitioner / Self - GP / Self (9 episodes, 2016-2017)
Self - Forensic Psychologist (7 episodes, 2019)
Self - GP (6 episodes, 2019)
Self - Former Detective / Self - Former Police Investigator / Self - Former Senior Detective / Self - Murder Detective (6 episodes, 2016-2019)
Self - Forensic Psychologist (5 episodes, 2016)
Self - Clinical Psychologist / Self - Psychologist (5 episodes, 2016-2018)
Love interest / Marjorie Wooliver / Vickie Dawn Jackson / Vicky Dawn Jackson (4 episodes, 2016-2018)
Beverley Allitt / Jeannie Miata / Rebecca Leighton (3 episodes, 2016)
Doctor / Stephan Letter (3 episodes, 2016)
Benjamin Geen / Detective (3 episodes, 2016)
Self - Medical Commentator (3 episodes, 2016)
Fiona Geen / Genene Jones (2 episodes, 2016)
Daniella Letter / Nurse (2 episodes, 2016)
Self - Reporter (2 episodes, 2016)
Self - Journalist / Self - Reporter (2 episodes, 2016)
Self - Former Det. Supt. / Self - Former Senior Police Officer (2 episodes, 2016)
Self - QC (2 episodes, 2019)
Genene Jones / Nurse (2 episodes, 2016)
Self - Journalist / Self - Reporter (2 episodes, 2019)
Detective Inspector Neil Jones / Detective Whalen (2 episodes, 2016-2017)
Malcolm Webster (1 episode, 2016)
Niels H (1 episode, 2016)
Colin Norris (1 episode, 2016)
Daniela Poggiali (1 episode, 2016)
Kimberley Clark Saenz (1 episode, 2016)
Charles Cullen (1 episode, 2017)
Karen Pedley (1 episode, 2019)
Bunthawee Rimmer (1 episode, 2019)
Greg Baker (1 episode, 2019)
Paul Novak (1 episode, 2019)
Thomas Dunkley (1 episode, 2019)
Maria Whiston (1 episode, 2019)
Chaz Higgs (1 episode, 2019)
Alison Firth (1 episode, 2019)
Megan Haines (1 episode)
Niels's Colleague (1 episode, 2016)
Detective Sup. Simon Barraclough (1 episode, 2016)
Senior Nurse (1 episode, 2016)
Self - Lufkin Police Department (1 episode, 2016)
Claire Morris (1 episode, 2016)
Amy Ridgeway (1 episode, 2017)
Kathy Augustine (1 episode, 2019)
Paul Norfolk (1 episode, 2019)
Alice Grant (1 episode, 2019)
Shaun Cummins (1 episode, 2019)
Shane Edge (1 episode, 2019)
Stephanie Stevens (1 episode, 2019)
Gladys Rowe (1 episode, 2019)
(1 episode)
Nurse Manager (1 episode, 2016)
Victorino Chua (1 episode, 2016)
Relative (1 episode, 2016)
Felicity Drumm (1 episode, 2016)
Dr. Steven Marcus (1 episode, 2017)
Tom Grant (1 episode, 2019)
Eric Lloyd (1 episode, 2019)
Self - Detective (1 episode, 2019)
Self - Television Reporter (1 episode, 2019)
Lance Rudge (1 episode, 2019)
Self - Paul's Neighbour (1 episode, 2019)
Boyfriend (1 episode)
Manager (1 episode, 2016)
Harold Boss (1 episode, 2016)
Self - Victim Advocate (1 episode, 2016)
Jane Drumm (1 episode, 2016)
Self - Former Detective Chief Inspector - Interviewed in 2011 (1 episode, 2016)
Self - Toxicologist (1 episode, 2017)
Thelma Purchase (1 episode, 2019)
Self - Deputy District Attorney, Retired (1 episode, 2019)
Self - Prosecutor (1 episode, 2016)
Detective (1 episode, 2016)
Self - Father of Paul (1 episode, 2016)
Herline Probert (1 episode, 2016)
Self - Crime Researcher (1 episode, 2019)
Self - Former Detective (1 episode, 2019)
Self - Victim's Brother (1 episode, 2019)
Self - Karen's Sister (1 episode, 2019)
Self - Forensic Psychologist (1 episode)
Self - Physician (1 episode, 2016)
(1 episode, 2016)
Self - Warwick University (1 episode, 2016)
Self - Former Detective - Suffolk Police (1 episode, 2019)
Self - Journalist (1 episode, 2016)
Self - Claire's Brother (1 episode, 2016)
Self - Greater Manchester Police (1 episode, 2016)
Self - Court Reporter (1 episode, 2016)
Self - Boxing Commentator (1 episode, 2019)
Self - Care Home Manager (1 episode, 2019)
Self - Former Coroner's Assistant (1 episode, 2019)
Self - Thelma's Former Partner (1 episode, 2019)
Self - Journalist (1 episode)
Self - Former Detective Inspector - Interviewed in 2011 (1 episode, 2016)
Self - Case Detective (1 episode, 2019)
Self - Pathologist (1 episode, 2019)
Kirk Jackson (1 episode, 2016)
Detective Inspector Paul Jones (1 episode, 2016)
Elizabeth Wettlaufer (1 episode, 2017)
Arpad Horvath (1 episode, 2017)
Donald Harvey (1 episode, 2017)
Self - Journalist (1 episode, 2018)
Nurse (1 episode, 2018)
Beverley James (1 episode, 2019)
Michelle LaFrance (1 episode, 2019)
Catherine Novak (1 episode, 2019)
Margie (1 episode)
Self (1 episode)
Victim's Daughter (1 episode)