John Morrison
Himself - Presenter / Narrator
Acting
Peter Jay
Himself - DCI, Metropolitan Police, 1983
Acting
Iain MacDhùghaill
Himself - Criminal Defence Lawyer
Acting
Archie MacLullich
Himself - Consultant Psychologist
Acting
Pàdraig MacAmhlaigh
Himself - Journalist
Acting
Julian Booth
Himself - Forensic Psychologist
Acting
Brian Masters
Himself - Author, 'Killing for Company - The Case of Dennis Nilsen'
Acting
Elizabeth Scott
Herself - Nilsen's Mother
Acting
Neil McKinven
Dennis Nilsen
Acting
Ryan Fletcher
Victim Jamie
Acting
John Paul Hurley
DCS Chambers
Acting
Lewis Brown
Young Nilsen
Acting
Finlay McLean
Nilsen's Grandfather
Acting
Nicholas Underwood
DCI Peter Jay
Acting
Andy Marjoribanks
Solicitor
Acting