| Self | Kennette Benedict (as Executive Director, Bulletin of Atomic Scientists), Steven M. Block (as Professor of Biophysics, Stanford University), Robert R. Butterworth (as Trauma Psychologist), Clark Chapman (as Senior Scientist - Southwest Research Institute), Joseph Cirincione (as Arms Control Analyst - Center for American Progress), Bethany Cobb (as Yale University), Charles David Dailyn (as Professor of Astronomy, Yale University), Hugo De Garis (as Director - International Institute of Artificial Intelligence - China), Laurie Garrett (as Senior Fellow - Council on Foreign Relations), Al Gore, John Grattan (as Volcanologist, University of Wales), James Hansen (as Director, NASA Goddard Institute), Susan Joy Hassol (as Co-Author "Climate Change Impacts on the United States"), Stephen Hawking, Rita Haxton (as Rapid City Regional Hospital), Phil Hespen (as Custer County Sheriff), Andrew Jakomas (as Witness to 1918 Flu), Gary Johnson (2) (as Pastor - Dove Christian Center), Michio Kaku (as Professor of Theoretical Physics, City University of New York), William Karesh (as Wildlife Conservation Society), Randall Larsen (as Director, Institute for Homeland Security), Stan Love (as Astronaut), James Lovelock (as Atmospheric Scientist), Ed Lu (as Astronaut), Bill McGuire (as Professor of Geohazards, University College London), Kevin Nadal, John Niehaus (as Rapid City Firefighter (as Lt. John Niehaus)), Michael Oppenheimer (as Professor of Geosciences, Princeton University), Michael Osterholm (as Center for Infectious Disease Research & Policy, University of Minnesota), Serguei Popov (as National Center for Biodefense & Infectious Diseases, George Mason University), Michael Rampino (as Professor of Earth Sciences, New York University), Irwin Redlener (as Director - National Center for Disaster Preparedness - Columbia University), Mike Roesler (as Rapid City Firefighter), Michael Shara (as Astrophysicist, American Museum of Natural History), Brian Toon (as Atmospheric Scientist), Neil deGrasse Tyson (as Astrophysicist: American Museum of Natural History), Elizabeth Vargas (as Anchor), Kevin Warwick (as Professor of Cybernetics, University of Reading) |
