Playing on server:
- Episode 1 The Top Ten Extraordinary Discoveries
- Episode 2 The Top Ten Mysterious Monoliths
- Episode 3 The Top Ten UFO Crashes
- Episode 4 The Top Ten Unexplained Technologies
- Episode 5 The Top Ten Secret Projects
- Episode 6 The Top Ten Mysterious Mountains
- Episode 7 Mysteries of the Aztecs
- Episode 8 The Glowing Orb Phenomenon
- Episode 9 The Legacy of J. Allen Hynek
- Episode 10 The Volcano Factor
- Episode 11 The Birdman Mystery
- Episode 12 The Abduction Files
- Episode 13 The Giants
- Episode 14 Aliens in Our Midst
- Episode 15 Britain's UFO Files
- Episode 16 Mysteries of the Norse Gods
- Episode 17 Secrets of Japan
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Ancient Aliens - Season 21
Did intelligent beings from outer space visit Earth thousands of years ago? From the age of the dinosaurs to ancient Egypt, from early cave drawings to continued mass sightings in the US, each episode gives historic depth to the questions, speculations, provocative controversies, first-hand accounts and grounded theories surrounding this age old debate.
Genre: Documentary, Mystery, Sci-Fi & Fantasy
Stars: Robert Clotworthy, Giorgio A. Tsoukalos, Ariel Bar Tzadok, Jonathan Young, David Childress, Erich von Däniken
Crew: Kevin Burns
Country: US
Studio: History
Runtime: 42:60 minutes
Quality: HD
First air date: Apr 20, 2010
Last air date: Aug 06, 2026
Episode: 291 Episode
Season: 22 Season
IMDb: 3.9
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