Plot
What if an extra-terrestrial force attacked Earth? What might that look like and how will the people of Earth respond? Consulting a cast of world-renowned scientists, survival experts and defense experts, National Geographic explores this frightening scenario. Experts reveal what could motivate alien invaders to attack Earth, and speculate on how the attack might play out, the strategy alien invaders might use, and the most effective ways for humans to respond.
Cast
as Narrator (voice)
as Self - SETI Institute
as Self - U.K. Ministry of Defense
as Self - Director of Defense Studies, West Point
as Self - Theoretical Physicist (archive footage)
as Self - USAF Air Command and Staff College
as Self - Physicist & Author
as Self - Co-Author, Alien Invasion: How to Defend Earth
as Self - Author, Contact with Alien Civilizations
as Self
Gallery