Robert Zubrin

饰：Himself - Astronautical Engineer

Rick Tumlinson

饰：Himself - Space Activist

Dale Myers

饰：Self,(as Dale D. Myers)

James Muncy

饰：Self,(as Jim Muncy)

Bill Posey

饰：Himself - Congressman

Norman Augustine

饰：Himself - Chairman Review of Human Spaceflight Committee

John M. Logsdon

饰：Himself - Professor George Washington University

加来道雄

Michio Kaku

饰：自己

吉因·克兰兹

Gene Kranz

饰：自己

Story Musgrave

饰：Self - Astronaut

吉姆·洛威尔

Jim Lovell

饰：Self - Astronaut

比尔·奈

Bill Nye

饰：Self - CEO Planetary Society

尼尔·德格拉塞·泰森

Neil deGrasse Tyson

饰：Self - Astrophysicist