TV show availability guide
In Search of Aliens
From the lost city of Atlantis to the Loch Ness Monster to the mystery of the Nazca Lines, the world is filled with tales of mysterious locations, mythical creatures and strange occurrences. But could these extraordinary stories and theories turn out to be stranger-than-fiction truths? If so, might there be an extraterrestrial explanation for these phenomena? IN SEARCH OF ALIENS follows Giorgio Tsoukalos, an Ancient Astronaut theorist and leading contributor to Ancient Aliens, as he explores the fascinating evidence behind some of the Earth’s most famous mysteries. Through Giorgio’s research of various sites around the world and meetings with scientists, witnesses and experts; this one-hour non-fiction series delves into the unknown and examines clues that could prove a possible extraterrestrial connection within some of the world’s greatest unsolved mysteries.
2014 6.2/10 community score 1 season · 10 episodes Ended
- Documentary
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Where to watch in United States
11 platforms currently listed across all viewing options
Data checked 25 Oct 2026, 21:27 UTC
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Series schedule
Seasons and episode dates
A concise series timeline, including the latest aired episode and the next date currently listed.
- First aired
- Seasons
- 1
- Episodes
- 10
- Status
- Ended
Latest aired episode
S1 E10
The Alien Code
Aired 43 min
Ancient Astronaut Theory has existed in popular culture for nearly 50 years, asking the question whether extraterrestrials visited Earth in the remote past. All around the world there are examples of physical evidence that suggest humans are not alone in the universe. But has this evidence been left behind for a purpose? Is it in fact a series of clues, or Alien Code, that we are meant to decipher? Ancient Astronaut theorist Giorgio A. Tsoukalos investigates unexplained mysteries from every corner of the world. The evidence shows that many ancient sites, and even modern ones like Roswell, all seem to be associated with legends and reports of someone or something coming down from the sky. Tsoukalos’ research demonstrates that many of these sites share a common symbol or shape–concentric circles. What is the significance of these designs, and is it possible they contain a coded, mathematical message left by alien visitors in the remote past?
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Season guide
Most recent seasons first
Season 1
10 episodes
First episode aired
About these dates: Air dates describe the series schedule and may change. They do not confirm that an episode is available on the same date from the providers listed above.
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