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 16 The Divine Number
- Season 16 The Lost Kingdom
- Season 16 The Galactic Keyhole
- Season 16 Giants of the Mediterranean
- Season 16 The Forbidden Bible
- Season 16 William Shatner Meets Ancient Aliens
- Season 16 Impossible Artifacts
- Season 16 The Space Travelers
- Season 16 The UFO Pioneers
- Season 16 The Harmonic Code
Ancient Aliens - Season 16 Episode 3 The Galactic Keyhole
7.00 42 minutes The mysterious symbol of the keyhole exists in mystic texts, sacred architecture and ancient artwork found all over the planet; exploring if this cryptic shape represents a profound connection to the cosmos.
