James Lurie
Narrator (voice)
Seth Shostak
Self - SETI Institute
Nick Pope
Self - U.K. Ministry of Defense
Brian De Toy
Self - Director of Defense Studies, West Point
Stephen Hawking
Self - Theoretical Physicist (archive footage)Paul Springer
Self - USAF Air Command and Staff CollegeTravis Taylor
Self - Physicist & AuthorBob Boan
Self - Co-Author, Alien Invasion: How to Defend EarthJohn Ringo
Self - Author, Live Free or DieMark Moffett
Self - Author: Adventures Among AntsDirk Schulze-Makuch
Self - Washington State University
Neil Strauss
Self - Author, Emergency
