John Turtle

饰：Self - Professor of Psychology, Ryerson University

迪克·史密斯

Dick Smith

饰：Self - Special Effects Makeup Artist

彼得·切斯尼

Peter Chesney

饰：Self - Special Effects Designer

James Kallstrom

饰：Self - Former Head of FBI

Randy Roberts

Randy Roberts

饰：Self - Author, 'John Wayne: American'

Peter Chesney Jr.

饰：Self - Special Effects Technician

Tom Wigley

饰：Self - Senior Scientist, National Center for Atmospheric Research, University Corporation for Atmospheric Research

Benton K. Partin

Benton K. Partin

饰：Self - Former Head of Military Weapons Research and Development

Joseph Golden

饰：Self - Senior Research Scientist, National Oceanic & Atmospheric Administration

Robert J. Durant

饰：Self - Roswell Researcher

John Bindernagel

饰：Self - Wildlife Biologist

Jeffrey Meldrum

饰：Self - Associate Professor of Anatomy, Idaho State University

Nina Jablonski

饰：Self - Director, Department of Anthropology, Pennsylvania State University

Bronston DeLone

Bronston DeLone

饰：Self - Bigfoot Actor

Stanton Friedman

饰：Self - Nuclear Physicist and Co-author, 'Crash at Corona'

Jesse Marcel Jr.

饰：Self - Eyewitness

Marc Wanamaker

饰：Self - Hollywood Historian

Frank Joyce

饰：Self - Journalist

Alvia Gaskill

饰：Self - President, Environmental Reference Materials Inc

Rosalind Peterson

饰：Self - Founder, California Skywatch