Emily Calandrelli

饰：Herself - Host

Marc D. Rayman

饰：Chief Engineer, Dawn Mission, JPL

Robert L. Crippen

饰：Self - Former Shuttle Astronaut

Mae C. Jemison

饰：Self - First Female Africam American Astronaut

Robert Zubrin

饰：Self - Author, The Case For Mars

Story Musgrave

饰：Self - Former Astronaut

Bernard A. Harris Jr.

饰：Self - Former Astronaut

詹姆斯·汉森

James R. Hansen

饰：Self - Author, First Man: The Life of Neil A Armstrong

Richard Zurek

饰：Self - NASA Chief Scientist - Mars Program

Matthew Golombek

饰：Self - NASA Mars Project Scientist

Geoffrey Notkin

饰：Self - President, Aerolite Meteorites Inc

Dava Newman

饰：Self - NASA Deputy Administrator

威廉·夏特纳

William Shatner

饰：Self

Anousheh Ansari

饰：Self - First Female Private Astronaut

Franklin Chang-Diaz

Franklin Chang-Diaz

饰：CEO, Ad Astra Rocket Company

Greg Carbin

饰：Self - Branch Chief, Weather Prediction Center

Sunita Williams

饰：Self - NASA Astronaut

Todd Barber

饰：Self - Lead Propulsion Engineer - Cassini Spacecraft