Esther Rantzen
В роли: Self - Presenter

Andrew Blake
В роли: Self - Founder, Seriously Ill for Medical Research

Colin Blakemore
В роли: Self - Research Defence Society (как Professor Colin Blakemore)

Terry Hill
В роли: Self - Animal Welfare Investigator)

Gill Langley
В роли: Self - Scientific Adviser, Dr Hadwen Trust (как Dr Gill Langley)

John Martin
В роли: Self - Cardiovascular Consultant & Researcher (как Professor John Martin)

Louise Perry
В роли: Self

Jill Phipps
В роли: Self (хроника)

Nancy Phipps
В роли: Self - Mother of Jill Phipps

Zab Phipps
В роли: Self (animal rights campaigner)