Steven S. Ross
饰：Himself - Author, `Construction Disasters`
戈登·马斯顿
Gordon Masterton
饰：自己
Travis S. Taylor
饰：Self - Engineer & Physicist
John Anderson
John Anderson
饰：Self - Biologist, College of the Atlantic
Trevor Valle
Trevor Valle
饰：Self - Herpetologist
吉米·布鲁克斯
Jimmy Brooks
饰：Self - National Lacy Dog Association
John Taylor
John Taylor
饰：Self - US Forest Service
Cary Fowler
饰：Self - Global Crop Diversity Trust
David DeKok
饰：Self - Author, Fire Underground
Helmut Ernst
饰：Self - Masspike Chief Engineer
James R. Chiles
饰：Self - Author, 'Inviting Disaster'
Jonathan Kirsch
饰：Self - Author, 'A History of the End of the World'
Hoyt Fields
饰：Self - Museum Director, Hearst Castle, CA State Parks
Michael J. Crosbie
饰：Self - Architect & Editor, 'Faith & Form'
Rick Hind
Rick Hind
饰：Self - Chemical Policy Expert
约翰·康普顿
John Compton
饰：Self - Geologist, University of Capetown
Jim Riccio
饰：Self - Nuclear Policy Analyst
Stan Gehrt
饰：Self - Wildlife Ecologist, Ohio State University
Jan Zalasiewicz
饰：Self - Author, 'The Earth After Us'
Howard Oliver
Howard Oliver
饰：Self - Forensic Pathologist
Ray Coppinger
Ray Coppinger
饰：Self - Author, 'Dogs'
大卫·布林
David Brin
饰：Self - Author, 'Earth'
Gene Kritsky
饰：Self - Entomologist, College of Mount St Joseph
Lynn Kimsey
饰：Self - Entomologist, University of California, Davis
Timothy Watson
Timothy Watson
饰：Narrator
Paul Bahn
饰：Self - Author, 'Cave Art'
John Hadidian
John Hadidian
饰：Self - Urban Ecologist, The Humane Society of the US
John Sanday
饰：Self - Global Heritage Fund
John Stubbs
饰：Self - World Monument Fund
Robert R. Cargill
Robert R. Cargill
饰：Self - Archaeologist, UCLA
Bob Nairn
饰：Self - Environmental Scientist, University of Oklahoma
Barrie Schwortz
饰：Self - Shroud of Turin Researcher
Ginger Strand
饰：Self - Author, 'Inventing Niagara'
Nicholas A. Veronico
饰：Self - Naval Historian
Earl Hatley
饰：Self - Grand Riverkeeper, LEAD Agency, Inc
Butch Mederos
Butch Mederos
饰：Self - General Manager, Palm Springs Facility, AES Wind