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".
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
Joel Morris
Tim Wells
Laurie Kynaston
Carl Stottor
Alexander Bhat
DS Jones