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 21 The Top Ten Extraordinary Discoveries
- Season 21 The Top Ten Mysterious Monoliths
- Season 21 The Top Ten UFO Crashes
- Season 21 The Top Ten Unexplained Technologies
- Season 21 The Top Ten Secret Projects
- Season 21 The Top Ten Mysterious Mountains
- Season 21 Mysteries of the Aztecs
- Season 21 The Glowing Orb Phenomenon
- Season 21 The Legacy of J. Allen Hynek
- Season 21 The Volcano Factor
- Season 21 The Birdman Mystery
- Season 21 The Abduction Files
- Season 21 The Giants
- Season 21 Aliens In Our Midst
- Season 21 Britain's UFO Files
- Season 21 Mysteries Of The Norse Gods
- Season 21 Secrets of Japan
- Season 21 Skulls of the Gods
- Season 21 Islands of the Gods
Ancient Aliens - Season 21 Episode 13 The Giants
7.00 42 minutes Examining how thousands of years ago, people all over the world described encounters with enormous, human-like beings; exploring how some archaeologists claim to have found skeletons of extraordinary size; is it possible the giants actually existed?
