Top Cast
Jeff Bridges
Self - Narrator (voice)
Piers Sellers
Self - NASA Astronaut & Research Scientist
Wesley Clark
Self - General, US Army (ret.); Former NATO Supreme Allied Cmdr.
Oren R. Lyons
Self - Dist Prof of American Studies, Onondaga Council of Chiefs
Timothy Morton
Self - Philosopher & Author, 'Humankind'
Bob Inglis
Self - Former Congressman (R), South Carolina
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Rich Pancost
Self - Professor of Biogeochemistry
Ruth Gates
Self - Marine Biologist; Dir. Hawaii Institute of Marine Biology
Renée Lertzman
Self - Author, ‘Environmental Melancholia’
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Leonard Mlodinow
Self - Physicist
