Top 10 Alien Plots
- Episode aired May 6, 2013
- 19m
After a review of conspiracy theories concerning extraterrestrial visitors, various ufologists speculate about aliens' possible good or bad motives.After a review of conspiracy theories concerning extraterrestrial visitors, various ufologists speculate about aliens' possible good or bad motives.After a review of conspiracy theories concerning extraterrestrial visitors, various ufologists speculate about aliens' possible good or bad motives.