Invasión alienígena: Reparto
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 College
Travis Taylor
Self - Physicist & Author
Bob Boan
Self - Co-Author, Alien Invasion: How to Defend Earth
Michael Michaud
Self - Author, Contact with Alien Civilizations
Paul Parsons
Self
John Ringo
Self - Author, Live Free or Die
Mark Moffett
Self - Author: Adventures Among Ants
Dirk Schulze-Makuch
Self - Washington State University
Neil Strauss
Self - Author, Emergency
Kevin Reeve
Self - onPoint Tactical
Quay Terry
Self - Gunnery Sergeant, USMC
Bill Brown
Self - High Altitude Research Corp.
Elise Cantu
Survivor
Carin Chea
Laboratory Scientist
Zee Cruise
Survivor
Leandro DiMonriva
Scientist
Kenneth Favell
Survivor
Philip Hersh
News Correspondent
Sydney Jay
Survivor
Christopher Clay Jones
Resistance Leader
Matt Lasky
Survival Expert
Eric Raymond Lim
Resistance Fighter
Desiree Martin
Survivor
Tiffany Martinez
Survivor
Richard Miraan
Astronomer
Jose Rosete
Survivor
David Schlachtenhaufen
Resistance Fighter
Christopher Warren
Agent Patterson
Avihai Yaffe
Survivor
Justin Cuomo
Human Resistance Leader