Timothy Cox
В роли: Self - Inherited Diseases Specialist, Addenbrooke's Hospital, Cambridge (как Prof Timothy Cox)
David Hunt
В роли: Self - Dept of Molecular Genetics, University College London (как Prof David Hunt)
Michael Moore
В роли: Self - Porphyria Specialist, Queensland University & Former Porphria Research Unit, Glasgow University, 1967-1971 (как Prof Michael Moore)
Roy Porter
В роли: Self - Medical Historian, The Wellcome Institute (как Prof Roy Porter)
John Rohl
В роли: Self - Dept of History, Sussex University (как Prof John R?hl)
Martin Warren
В роли: Self - Dept of Molecular Genetics, University College London (как Dr Martin Warren)