Сэмюэл Уэст
В роли: Self - Narrator (голос)

Paul Binkley
В роли: Self - Detective Inspector (retired), curator, Crime Museum, New Scotland Yard

John Chambers
В роли: Self - Ripperologist

Kate Colquhoun
В роли: Self - author, Murder in the First Class Carriage

Jeff Edwards
В роли: Self - President, Crime Reporters Association

Jonathan Evans
В роли: Self - archivist, Royal London Hospital Museum

John Farndon
В роли: Self - author, dramatist, Napoleon of Crime

Judith Flanders
В роли: Self - author, The Invention of Murder

Ли Николас Харрис
В роли: 1940's Police Officer / CID / Gang Member

Peter Hawkshaw
В роли: Fran?ois Benjamin Courvoisier (Lord William Russels valet / murderer)

Alan Moss
В роли: Self - Chief Superintendent (retired), police historian

John Shatford
В роли: Self - Detective Chief Superintendent (retired), Scotland Yard Flying Squad (как John Shatford)

Кит Скиннер
В роли: Self - historical researcher

Katherine D. Watson
В роли: Self - senior lecturer, Oxford Brookes University