William Potter

饰：自己

T. Colin Campbell

饰：Himself - Professor of Nutritional Biochemistry

Gary Francione

饰：Himself - Distinguished Professor of Law

Jan Gerdes

饰：Himself - Hof Butenland

Robert Goodland

饰：Himself - Tropical Ecologist

Susanne Gura

饰：Herself - Nutritionist

Hendrik Haßel

饰：Himself - Animal Equality

Melanie Joy

饰：Herself - Sociologist & Psychologist

Kati Kosler

饰：Herself

Karin Mück

饰：Herself - Hof Butenland

Sharon Núñez

饰：Herself - Co-Founder, Animal Equality

Lauren Ornelas

饰：Herself - Food Empowernment Project

Jonathan Balcombe

Jonathan Balcombe

饰：Self - Ethologist, Biologist

彼得·辛格

Peter Singer

饰：Self - Professor of Bioethics