Cast
Self - Fuehrer and Chancellor of Germany
Self - Hadland's Employee
Self - Detective Constable
Self - Serial Killer, Teacup Poisoner
Self - Former Senior Reporter, Evening Echo, Hemel Hempstead
Self - Crime Historian, Oxford Brookes University
Self - Detective Constable
Self - Former School Friend, John Kelly Boys School, Neasden
Self - Hadland's Employee
Self - Hadland's Employee
Self - Senior Lecturer in Criminology, City University, London
Self - Managing Director, Hadland's
Self - Hadland's Employee
Self - Director, John Hadland Laboratories
Self - Detective Chief Inspector, Hemel Hempstead Police
Self - Detective Constable
Self - Former School Friend
Self - Trainee Solicitor in 1971
Self - Detective Sergeant, Hemel Hempstead Police
Self - Consultant, Forensic Psychiatrist
Self - Murderer, 'Prince of Poisoners'
