Season
- 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 21 2025-02-07
Season 21 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
- Season 20 Mysteries of the Maya
- Season 20 Unlocking the Stargates
- Season 20 The Whistleblowers
- Season 20 The Search For Extraterrestrial Intelligence
- Season 20 Jacques Vallée: UFO Pioneer
- Season 20 The Teachers
- Season 20 Egypt's Giant Tombs
- Season 20 The Linda Moulton Howe Files
- Season 20 The Chosen
- Season 20 Resurrecting Puma Punku
Ancient Aliens - Season 20 Episode 20 Resurrecting Puma Punku
7.00 42 minutes Puma Punku in Bolivia features stone blocks, each carved with precision; the blocks lie scattered across the landscape, confusing archaeologists as to what the ancient site might have been.
