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
Rich Pancost
Self - Professor of Biogeochemistry
Ruth Gates
Self - Marine Biologist; Dir. Hawaii Institute of Marine Biology
