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 19 The Hotspot Connection
- Season 19 The Crop Circle Code
- Season 19 Mystery of the Lost Civilization
- Season 19 The Power of the Obelisks
- Season 19 The MUFON Files
- Season 19 Cosmic Impacts
- Season 19 Close Encounters of the Fifth Kind
- Season 19 The Mysteries of Alaska
- Season 19 Aliens in our Airspace
- Season 19 The Giants of Malta
- Season 19 The Top Ten Pyramid Sites
- Season 19 The Top Ten Mysterious Devices
- Season 19 The Top Ten Mysterious Islands
- Season 19 The Top Ten Alien Craft
- Season 19 Edgar Cayce: The Sleeping Prophet
- Season 19 The Gods of Greece
- Season 19 The New UFO Hunters
- Season 19 Power of the Talisman
- Season 19 The Top Ten Mysteries of the Deep
- Season 19 The Top Ten Alien Petroglyphs
Ancient Aliens - Season 19 Episode 20 The Top Ten Alien Petroglyphs
7.00 42 minutes Counting down the top ten alien petroglyphs around the world, from strange, human-like figures to flying craft and carvings of what appear to be astronauts. Could these mysterious carvings provide a record of extraterrestrial visitation?
