James Lurie

Narrator

Travis Taylor

Self - Engineer & Physicist

John Anderson

Self - Biologist, College of the Atlantic, Self - College of the Atlantic

Trevor S. Valle

Self - Herpetologist, Self - Paleontologist, La Brea Tar Pits

Gordon Masterton

Self - The Institution of Civil Engineers, Self - Royal Academy of Engineering

Ray Coppinger

Self - Author, 'Dogs', Self - Hampshire College

William Leffler

Self - Author, 'Oil & Gas Pipelines in Nontechnical Language', Self - Author, 'Petroleum Refining in Nontechnical Language'

Stein Sture

Self - Civil Engineer, University of Colorado, Self - Civil Engineer, University of Colorado, Boulder

Steven S. Ross

Self - Author, 'Construction Disasters'

Jan Zalasiewicz

Self - Author - 'Earth After Us', Self - Author, 'The Earth After Us'

Howard Oliver

Self - Forensic Pathologist

Alan W. Pense

Self - Metallurgist, Lehigh University

David Brin

Self - Author, 'Earth'

Frank Lowenstein

Self - Ecologist, The Nature Conservancy

Richard Gutkowski

Self - Civil Engineer, Colorado State University, Self - Structural Engineer, Colorado State University

Gene Kritsky

Self - Entomologist, College of Mount St. Joseph

Leslie Lyons

Self - Veterinary Geneticist, Univeristy of California, Davis