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