导演 Louis C. Tarantino

Narrator (voice) James Lurie

Self - SETI Institute Seth Shostak

Self - U.K. Ministry of Defense Nick Pope

Self - Director of Defense Studies, West Point Brian De Toy

Self - Theoretical Physicist (archive footage) 史蒂夫·霍金

Self - USAF Air Command and Staff College Paul Springer

Self - Physicist & Author Travis Taylor

Self - Co-Author, Alien Invasion: How to Defend Earth Bob Boan

Self - Author, Contact with Alien Civilizations Michael Michaud

Self Paul Parsons

Self - Author, Live Free or Die John Ringo

Self - Author: Adventures Among Ants Mark Moffett

Self - Washington State University Dirk Schulze-Makuch

Self - Author, Emergency Neil Strauss

Self - onPoint Tactical Kevin Reeve

Self - Gunnery Sergeant, USMC Quay Terry

Self - High Altitude Research Corp. Bill Brown

Survivor Elise Cantu

Laboratory Scientist Carin Chea

Survivor Zee Cruise

Scientist Leandro DiMonriva

Survivor Kenneth Favell

News Correspondent 菲利普·赫许

Survivor Sydney Jay

Resistance Leader Christopher Clay Jones

Survival Expert Matt Lasky

Resistance Fighter Eric Raymond Lim

Survivor Desiree Martin

Survivor Tiffany Martinez

Astronomer Richard Miraan

Survivor Jose Rosete

Resistance Fighter David Schlachtenhaufen

Agent Patterson Christopher Warren

Survivor Avihai Yaffe

Human Resistance Leader Justin Cuomo