理查德·道金斯

Richard Dawkins

饰：自己

Gary Francione

饰：Himself

坦普尔•葛兰汀 Temple Grandin

Temple Grandin

饰：自己

Bruce Friedrich

Bruce Friedrich

饰：Self

Ingrid Newkirk

Ingrid Newkirk

饰：Self

彼得·辛格

Peter Singer

饰：Self