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