凯莉·亨特

Kelly Hunter

饰：旁白配音 Herself - Narrator

John Bradshaw

饰：本人 Himself - University of Bristol (as Dr John Bradshaw)

Oliver Burman

Oliver Burman

饰：本人 Himself - University of Lincoln (as Dr Oliver Burman)

Sarah Ellis

饰：本人 Herself - University of Lincoln (as Dr Sarah Ellis)

David Hicks

David Hicks

饰：本人 Himself - Farmer

Alia Sheikh

Alia Sheikh

饰：本人

Alan Wilson

Alan Wilson

饰：本人 Himself - Structure & Motion Lab, Royal Veterinary College (a