10 Best Ancient Aliens Episodes You Need to Watch

Best Ancient Aliens Episodes

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How were the pyramids built? Who created the crop circles? Well, History Channel’s successful show, Ancient Aliens, offers their theories about the topics. The show has been running since 2009 and has produced over 200 episodes of interesting theories about the world and how science, mythology, and history, might actually be fruits of the same tree.

Whether you’re a believer or not, there were numerous episodes that garnered some really interesting theories. If you are planning on watching this show, here’s a hand-picked list of the ten best Ancient Aliens episodes that you really need to watch.

The Evidence

ancient aliens the evidence

Ep. number: Season 1 Episode 1

Aired: April 20, 2010

Synopsis: “If ancient aliens visited Earth, what was their legacy, and did they leave behind clues that exist in plain sight such as sophisticated aircraft, complex electrical grids, and intricate construction machinery? Indian Sanskrit texts, dating back to 6000 B.C., describe in varying but vivid detail flying machines called Vimanas. 

Megalithic stone structures in Egypt reveal evidence of precision saw work. Interpretations of the Jewish Zohar writings offer depictions of a life-sustaining manna machine, eerily similar to chlorella algae processing systems today. Are these examples of modern technology, or is there evidence that these incredible mechanisms existed on Earth thousands of years ago?”

Why you should watch it: You have to start somewhere, and what better episode to start with than the first Ancient Aliens episode ever? It takes you through the main hypotheses of the show and works as a nice introduction to let you know what to expect throughout the entire series.

Watch the full episode here.

The World On Alert

ancient aliens the world on alert

Ep. number: Season 18 Episode 4

Aired: January 28, 2022

Synopsis: “Across the globe, high-ranking government officials are openly talking about Unidentified Aerial Phenomena. But why now? Ancient Astronaut theorists suggest the evidence has become too great to ignore–and the truth about an extraterrestrial presence on Earth will soon be revealed.”

Why you should watch it: This particular episode came in the newest season of Ancient Aliens but is also one of the best-rated episodes from the show ever, with an 8.2 IMDb rating. It poses some intriguing theories and backs them up with (kind of) evidence. It’ll tickle your curiosity, for sure.

Watch the full episode here.

The Disclosure Event

ancient aliens the disclosure event 1

Ep. number: Season 18 Episode 1

Aired: January 7, 2022

Synopsis: “In 2021. the United States government broke a 70-year precedent of denying UFOs and released a groundbreaking report on Unidentified Aerial Phenomena. Are we on the brink of full government disclosure about the strange objects witnessed in our skies? And if so, will we soon discover that they are, in fact, of extraterrestrial origin?”


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Why you should watch it: This is yet another newer episode that gives us new insights into the UFOs and UAP. The report that they are referring to really did come out, but never was it stated that any of the objects were of extraterrestrial origins. Still, it’s a very well-crafted episode – probably one of my favorites from the show.

Watch the full episode here.

The Alien Architects

ancient aliens the alien architects

Ep. number: Season 12 Episode 4

Aired: May 19, 2017

Synopsis: “Many of the architectural marvels of the ancient world bear striking similarities to one another, even though they were built by civilizations that were separated by thousands of miles and are believed to have had no contact with one another. 

Separated by more than 7500 miles, the Giza pyramid complex in Giza, Egypt and the Avenue of the Dead in Teotihuacan, Mexico contain pyramids that are aligned with the constellation of Orion’s belt. An ancient pyramid temple in Cambodia known as Baksei Chamkrong is an almost identical match for the Temple of the Jaguar in Guatemala. 

Many structures built using stone slabs that weighed over a hundred tons. But how did primitive people achieve such extraordinary feats? And why do we see such similarities? Could these sites have all been designed by alien architects?”

Why you should watch it: There is not really much to say about this one, other than that it theorizes about how ancient structures and buildings were created. Was humankind really that advanced, or did they have extraterrestrial help?

Watch the full episode here.

The NASA Connection

ancient aliens the nasa connection

Ep. number: Season 4 Episode 5

Aired: March 9, 2012

Synopsis: “NASA scientists, former astronauts and secret government files all point to the conclusion that there has been contact with extraterrestrial life in the past.”

Why you should watch it: The NASA Connection is one of the most talked-about episodes of Ancient Aliens ever. Some very credible witnesses talked about what they knew, and there’s really a compelling amount of evidence that NASA, and humankind in general, already had extraterrestrial contact. You choose what you believe.

Watch a snippet from the episode here.


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Top Ten Alien Artifacts

ancient aliens top ten ancient artifacts

Ep. number: Season 17 Episode 7

Aired: October 8, 2021

Synopsis: “Ancient Aliens has traveled the globe and investigated strange objects found on every continent on Earth. We’re counting down the top ten alien artifacts. Objects that could provide evidence that extraterrestrials once walked among us.”


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Why you should watch it: This one is self-explanatory – in the episode, the Ancient Aliens crew counts down the ten most credible alien artifacts and talks about them in detail, theorizing about what they are and how they ended up on Earth.

The Tesla Experiment

ancient aliens the tesla

Ep. number: Season 8 Episode 6

Aired: August 1, 2014

Synopsis: “He is one of the most prolific inventors of the 20th century–and the man that actually electrified the world. Nikola Tesla shepherded mankind to a new industrial era and laid the groundwork for today’s technological age–but could that have been by some otherworldly design? 

A man shrouded in mystery and intrigue, Tesla would speak about obtaining insights in a flash of genius, how he could visualize his inventions in full detail and manipulate them in his mind, and his compulsion to invent the future. But he also claimed to have direct communication from intelligent beings on other planets. 

Is it possible that this alleged mad scientist, so far ahead of his time, was actually a human “receiver”? A being tapped to advance mankind–and pave the way for a future reunion with our alien ancestors?”

Why you should watch it: I’m not sure if Nikola Tesla was contacted by aliens or if he was simply a super-genius that was misunderstood by his peers but to see the wonders he created and the effect they had on the entire humanity is groundbreaking. This episode is definitely worth a watch!

Watch a snippet from the episode here.

The Mayan Conspiracy

ancient aliens the mayan conspiracy

Ep. number: Season 4 Episode 1

Aired: February 17, 2012

Synopsis: “The Mayan civilization dominated Central America for nearly 2000 years, but by the 9th century A.D., the great Mayan cities were abandoned, and the Mayan people vanished. What could have happened to this advanced culture?”

Why you should watch it: The most popular Ancient Aliens theories revolve around the Mayan civilization, and this episode does a great job at presenting those theories, underlined with artifacts, structures, and other evidence that the Mayas, if anything, were a mysterious civilization, way ahead of its time.

Watch the full episode here.

Angels And Aliens

ancient aliens angels and aliens

Ep. number: Season 2 Episode 7

Aired: December 9, 2010

Synopsis: “Biblical texts and ancient lore frequently describe winged creatures carrying messages from the heavens. But are angels merely the product of mankind’s imagination–or do they really exist? If so, where do they come from? Ancient astronaut theorists suggest that the Bible’s Old Testament reads like a handbook on extraterrestrial visitations. 

Accounts of angels can also be found in Islamic and Indian texts. Infinite stories around the globe describe unearthly guardians entrusted to both observe and protect as well as tales of powerful warriors bringing about everything from plague to peace. 

Are angels really supernatural beings from heaven or something more? If so, might angels really be travelers–visiting Earth from distant planets?”


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Why you should watch it: The official synopsis above sums up the episode perfectly – are angles really mythical beings, or are they simply a human interpretation of something – or someone – else? The theory is a bit rough around the edges but intriguing to watch.

Watch the full episode here.

Destination Mars

ancient aliens destination mars

Ep. number: Season 11 Episode 2

Aired: May 13, 2016

Synopsis: “Within 20 years, we are expecting to send the first colonizers to the Red Planet. Astronauts will brave the six-month journey to become the first extraterrestrials visitors to Mars–where they are expected to live and die there, never to return to Earth. But why have we always had a strange fascination with this particular planet? 

The latest NASA research has revealed that not only is there evidence of liquid water on the planet, but that life on Earth was most likely seeded on Mars. Ancient Astronaut theorists even suggest that the development of life on Earth may have similarities to how scientists are currently planning to keep humans alive on the red planet.

Could extraterrestrials from Mars have colonized Earth in our remote past? Could our voyage to Mars not only unlock the mysteries of our ancient, extraterrestrial origins–but also be the key to the long-term survival of the human species?”

Why you should watch it: Whenever we think of aliens, we somehow always think of Mars first. This episode theorizes about “the Martians” and if it’s possible that there’s an entire civilization on the Red Planet.

Watch the full episode here.

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