Distributia
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William J. BirnesHimself (as Bill Birnes Ph.D.)
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Robert ClotworthyHimself - Narrator (voice)
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Robert BauvalHimself
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David ChildressHimself
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Christopher DunnHimself
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Steven M. GreerHimself (as Dr. Steven M. Greer)
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Michael CremoHimself
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Philip CoppensHimself
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Debbie ChallisHerself - Historian (as Debbie Challis Ph.D.)
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Peter FiebagHimself
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Uwe ApelHimself - Aerospace Engineer (as Dr. Uwe Apel)
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Algund EenboomHimself (as Dr. Algund Eenboom)
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Robert H. FrisbeeHimself - Propulsion Systems Engineer NASA (as Robert H. Frisbee Ph.D.)
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Michael DunnHimself - Mining Engineer
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Rodney DaleHimself