Revisit the most compelling mysteries explored over the past 15 years of "Ancient Aliens." Experts like Giorgio Tsoukalos, David Childress, William Henry, and Jason Martell engage in conversations around Ancient Astronaut Theory in each episode.
1997
1986
2016
2015
1965
1983
1979
2017
2008
2009
1992
1980
2022
2018
2004
2021
2012
