Ancient Aliens Season 21 Episode Scripts
Season 21
1. The Top Ten Extraordinary Discoveries2. The Top Ten Mysterious Monoliths
3. The Top Ten UFO Crashes
4. The Top Ten Unexplained Technologies
5. The Top Ten Secret Projects
6. The Top Ten Mysterious Mountains
7. Mysteries of the Aztecs
7. Mysteries of the Aztecs
8. The Glowing Orb Phenomenon
9. The Legacy of J. Allen Hynek
10. The Volcano Factor
11. The Birdman Mystery
12. The Abduction Files
13. The Giants
14. Aliens in Our Midst
15. Britain's UFO Files
16. Mysteries of the Norse Gods
17. Secrets Of Japan