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