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.
Extraordinary Engineering
Season 1 • Episode 1
Ancient Close Encounters
Season 1 • Episode 2
Sky Gods and Star Beings
Season 1 • Episode 3
Human Genesis
Season 1 • Episode 4
Mysterious Underground Worlds
Season 1 • Episode 5
Alien Arsenal
Season 1 • Episode 6
Mystery of the Pyramids
Season 1 • Episode 7
Alien Observatories
Season 1 • Episode 8
Extraterrestrial Devices (Alien Technology)
Season 1 • Episode 9
Submerged Evidence
Season 1 • Episode 10
Alien Beacons
Season 1 • Episode 11
Alien Messengers
Season 1 • Episode 12
