Distributia
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Vanna BontaHerself
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Michio KakuHimself
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Erik ThompsonNarrator
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Allen NewcombHimself - Vanna's Husband
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Will WhitehornHimself - Virgin Galactic
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John SpencerHimself - Space Architect
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Jim LoganHimself - Space Medicine Associates (as Dr. Jim Logan)
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Sheryl BishopHerself - Univ. of Texas, Medical Branch (as Sheryl L. Bishop)