奈尔·德葛拉司·泰森

Neil Tyson

饰：Himself - Host

布赖恩·黑尔

Brian Hare

饰：自己

Jean Berko Gleason

饰：Self - Psycholinguist, Boston University

Kathie Hahn

饰：Self - Fan of Alex

Kathleen Lance

饰：Self - Fan of Alex

Irene Pepperberg

饰：Self - Biologist

Anna Schwartz

饰：Self - Research Assistant

尼尔·德格拉塞·泰森

Neil deGrasse Tyson

饰：Self - Host

Jake Ward

饰：Self - Correspondent

Teri Bolton

饰：Self - Roatan Institute for Marine Sciences

Roger Hanlon

饰：Self - Marine Biological Laboratory

Stan Kuczaj

饰：Self - University of Southern Mississippi

Arlene Lewin

饰：Self - Lab Manager

John W. Pilly

饰：Self - Wofford College

Dallas K. Schittler Jr.

饰：Self - Fan of Alex

Carol Sokalski

饰：Self - Fan of Alex

Jacob Ward

饰：Self

Clive D.L. Wynne

饰：Self - University of Florida