Найджел Хэверс
В роли: Self - Narrator (голос)

Jim Allcock
В роли: Self - Secretary, British Veterinary Association

Roy Calne
В роли: Self - Dept. of Surgery, Univ. of Cambridge Clinical School (как Prof. Roy Calne FRS)

Barry Cross
В роли: Self - Director, Institute of Animal Physiology (как Dr. Barry Cross FRS)

Tom Dalyell
В роли: Self - Former Opposition Spokesman for Science (как Tam Dalyell MP)

Judith Hampson
В роли: Self - Animal Experimentation Officer, R.S.P.C.A. (как Dr. Judith Hampson)

Barry Hart
В роли: Self - Home Office Inspector

Clive Hollands
В роли: Self - Secretary, Committee for the Reform of Animal Experimentation

Ronnie Lee
В роли: Self - Spokesman, Animal Liberation Front

Джоанна Ламли
В роли: Self - Actress

Walter Perry
В роли: Self - Chairman, Research Defence Society (как Lord Perry)

Timothy Raison
В роли: Self - Minister of State, Home Office (как Rt. Hon. Timothy Raison MP)

Mike Seymour-Rouse
В роли: Self - Director, Eurogroup for Animal Welfare

Eric Snell
В роли: Self - Spokesman, British Pharmaceutical Industry (как Dr. Eric Snell)

Angela Walder
В роли: Self - Scientific Adviser, British Union for the Abolition of Vivisection

David Walker
В роли: Self - Spokesman, Contract Laboratory Group