The story of one of the most infamous cases in UK criminal history, that of serial killer Dennis Nilsen. Told through the prism of three men, the series explores the personal and professional consequences of coming into contact with a man like Nilsen.
On 9 February 1983, Detective Chief Inspector Peter Jay discovers a drain clogged with rotting flesh and bones. The culprit, Dennis Nilsen, freely admits to the police that it's not just one or two bodies, but "15 or 16, I think".
With limited resources, Jay and the police continue to dig into Nilsen's memories in an effort to convict him for the murder of every one of his victims. But when Des withdraws his cooperation and stops talking, Jay fears justice will be lost.
Reeling from Des' change in plea, Jay and the police throw themselves into proving premeditation. If they can show the court that Des was undoubtedly of sound mind when he committed his crimes, he will go down and never be released.
David Tennant
Dennis Nilsen
Daniel Mays
DCI Peter Jay
Jason Watkins
Brian Masters
Ron Cook
DSI Chambers
Faye McKeever
Linda Jay
Barry Ward
DI Steve McCusker
Ben Bailey Smith
DC Brian Lodge
Alex Bhat
DS Jones
Jay Simpson
DS Chris Healey
Bronagh Waugh
Charlotte Proctor
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