Philip Gingerich

饰：Himself - palaeontologist

Grant Zazula

饰：Himself

Anjali Goswami

饰：Herself

Mark Norell

饰：Himself - palaeontologist

Hans Thewissen

饰：Himself

Steve Brusatte

饰：Himself - palaeontologist

Fred Spoor

饰：Himself

Xu Xing

饰：Himself - palaeontologist

Alan Turner

Alan Turner

饰：Self - palaeontologist

雷格·E·凯蒂

Reg E. Cathey

饰：Narrator