The story of serial killer Dennis Nilsen, who murdered 15 young men in the 1980s.

John Morrison
as Himself - Presenter / Narrator

Peter Jay
as Himself - DCI, Metropolitan Police, 1983

Iain MacDhùghaill
as Himself - Criminal Defence Lawyer

Archie MacLullich
as Himself - Consultant Psychologist

Pàdraig MacAmhlaigh
as Himself - Journalist

Julian Booth
as Himself - Forensic Psychologist

Brian Masters
as Himself - Author, 'Killing for Company - The Case of Dennis Nilsen'

Elizabeth Scott
as Herself - Nilsen's Mother

Neil McKinven
as Dennis Nilsen

Ryan Fletcher
as Victim Jamie