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- Season 0 2009-03-08
- Season 1 2010-04-20
- Season 2 2010-10-28
- Season 3 2011-07-28
- Season 4 2012-02-17
- Season 5 2012-12-21
- Season 6 2013-09-30
- Season 7 2014-01-24
- Season 8 2014-06-13
- Season 9 2014-10-31
- Season 10 2015-07-24
- Season 11 2016-05-06
- Season 12 2017-04-28
- Season 13 2018-04-27
- Season 14 2019-05-31
- Season 15 2020-01-25
- Season 16 2020-11-13
- Season 17 2021-08-06
- Season 18 2022-01-07
- Season 19 2023-01-06
- Season 20 2024-01-05
Season 20 Episode
- Season 20 The Top Ten Alien Influencers
- Season 20 The Top Ten Extraordinary Creatures
- Season 20 The Top Ten Hidden Alien Bases
- Season 20 The Top Ten Scariest Encounters
- Season 20 The Top Ten Alien Codes
- Season 20 The Top Ten Alien Disasters
- Season 20 Secrets Of The Sumerians
- Season 20 The UFO Superhighway
- Season 20 Mysteries of Scotland
- Season 20 Mystery of the Stone Spheres
Ancient Aliens
6.82 42 minutes 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.
