理查德·林特恩

Richard Lintern

饰：Self - Narrator

Emma Kenny

饰：Self - Psychologist

Keri Nixon

饰：Self - Forensic Psychologist

Phil Roberts

饰：Self - Investigating Officer Merseyside Police

James Rastall

饰：Jeffery Dahmer

Geoffrey Wansell

Geoffrey Wansell

饰：Self - Author & Expert on Serial Killers

Kerry Daynes

饰：Self - Consultant Psychologist

Clive Driscoll

饰：Self - Former Detective Chief Inspector, Metropolitan Police

布莱恩·马斯特斯

Brian Masters

饰：Self - Killing for Company

James Fallon

饰：Self - Neuroscientist, University of California

David Swindle

饰：Self - Former Detective Superintendent, Strathclyde Police

Jim Gamble

饰：Self - Ex-CEO, Child Protection Agency