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AG - Audienta generala
- Comentarii Comenteaza
Actori
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Helen McCroryHerself - Narrator (voice) -
Douglas SmithHimself - Yellowstone National Park (as Dr Doug Smith) -
Claudio GroffHimself - Provincia Autonoma di Trento (as Dr Claudio Groff)
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Roy RenkinHimself - Yellowstone National Park
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Kira Cassidy-QuimbyHerself - Yellowstone National Park
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Mark CunninghamHimself - Fish and Wildlife Research Institute (as Dr Mark Cunningham)
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Tim BowersHimself
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Felisa A. SmithHerself - University of New Mexico (as Prof Felisa A. Smith)
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Mark LotzHimself - Fish and Wildlife Research Institute
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Reg MaloneHimself
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Dave OnoratoHimself - Fish and Wildlife Research Institute (as Dr Dave Onorato)
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Al SanchezHimself
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Jared BybeeHimself - Bureau of Land Management
