Distributia
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Mike CappsHimself - Technology Theorist
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William J. BirnesHimself - Phd., Author: Space Wars (as Bill Birnes)
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Erik DellumsNarrator (as Erik Todd Dellums)
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Stanton FriedmanHimself - Nuclear Physicist
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Story MusgraveHimself - Astronaut
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James E. ObergHimself - Ex-NASA Engineer
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Chris McKayHimself - Phd., NASA Astrobiologist
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Brad DaltonHimself - Phd., Planetary Scientist
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Robert GibsonHimself - NASA Astronaut (as 'Hoot' Gibson')
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Marc D'AntonioHimself - Astronomer and Image Analyst
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Dan BenkertHimself - Space Blogger
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Christopher OrwollHimself - Aerospace Historian
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Gilbert LevinHimself - Professor / Viking Mission Scientist
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Daniel CastroHimself - Phd., Astrophysicist
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J.J. KavelaarsHimself - Phd., Astronomer
