Ηθοποιοί επεισοδίου
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John Logan AllenHimself - Geographer
Stephen E. AmbroseHimself - Historian
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Gerard BakerHimself - Mandan-Hidatsa
Kevin ConwayPatrick Gass
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Erica FunkhouserHerself - Writer
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William Least Heat-MoonHimself - Writer
Gene JonesJoseph Whitehouse
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Mylie LawyerHerself - Descendant of Twisted Hair
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James P. RondaHimself - Historian
Μέρφι ΓκάιερWilliam Clark (voice)
Hal HolbrookNarrator (voice)
Σαμ ΓουότερστονThomas Jefferson (voice)
Adam ArkinMerriwether Lewis (voice)
Μάθιου ΜπρόντερικJohn Ordway (voice)