The BEST Episodes of Ancient Aliens

Every episode ever - ranked by fan votes!

Last Updated: Jul 27, 2019

Ancient Aliens explores the controversial theory that extraterrestrials have visited Earth for millions of years. From the age of the dinosaurs to ancient Egypt, from early cave drawings to continued mass sightings in the US, each episode in this hit HISTORY series gives historic depth to the questions, speculations, provocative controversies, first-hand accounts and grounded theories surrounding this age old debate. Did intelligent beings from outer space visit Earth thousands of years ago?

The Da Vinci Conspiracy

#1 - The Da Vinci Conspiracy

Season 4 - Episode 8

Might an examination of Leonardo Da Vinci's masterful paintings, highly technical hand-drawn sketches, and private journals reveal knowledge of otherworldly technology and extraterrestrial beings?

star 8.05
221 votes
The Artificial Human

#2 - The Artificial Human

Season 13 - Episode 13

A look at whether or not intelligent robots are a threat to humanity or the next step in human evolution; as man and machine begin to merge, humanity could be fulfilling a destiny prepared for by aliens thousands of years ago.

star 8.02
154 votes
The Alien Phenomenon

#3 - The Alien Phenomenon

Season 13 - Episode 14

Erich von Däniken's "Chariots of the Gods?" suggests that aliens visited Earth in the distant past, and there are those who believe that he will be proven right.

star 8.01
111 votes
The Genius Factor

#4 - The Genius Factor

Season 7 - Episode 4

Throughout history, many of the world's greatest thinkers have helped push civilization forward with their profound insights and extraordinary abilities. But the majority of these master minds say their brilliance comes from a place they don't understand-and arrives at times they're not expecting it. In antiquity, people in nearly every culture around the world believed they did not possess genius, but that genius possessed them, like a spirit. Could it be that the forces of inspiration that the ancients attributed to the gods really did emanate from an otherworldly ...

star 8.01
163 votes
Earth Station Egypt

#5 - Earth Station Egypt

Season 13 - Episode 7

Ancient astronaut theorist Giorgio A. Tsoukalos explores the latest scientific discoveries at some of the world's most ancient places to find evidence that extraterrestrials visited Egypt in the distant past.

star 7.98
188 votes
The Tesla Experiment

#6 - The Tesla Experiment

Season 6 - Episode 16

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?

star 7.97
160 votes
Aliens and Superheroes

#7 - Aliens and Superheroes

Season 6 - Episode 19

From the beginning of recorded history, humans have told stories about beings with super-human strength, super-sonic speed, and supernatural abilities. The ancients had heroic tales about Zeus, Thor, and Hanuman while today we have superhero stories about Superman, Batman, and Spider-man. Mythologists say these epic stories resemble each other because they may have all come from a common set of oral legends created eons ago by our earliest ancestors. But might there be another, more otherworldly reason that the world's heroic myths are so similar? Is it possible, as many Ancient Astronaut Theorists contend, that these stories are actually based on extraordinary-- and possibly extraterrestrial--beings that lived on Earth in the distant past?

star 7.91
134 votes
The Alien Protocols

#8 - The Alien Protocols

Season 13 - Episode 3

In 2017, a strange, cigar-shaped object enters the solar system from another star system, traveling in such an unusual trajectory it causes some astronomers to suggest that it could be an extraterrestrial craft.

star 7.90
228 votes
Element 115

#9 - Element 115

Season 14 - Episode 3

According to physicist Bob Lazar, Element 115 is the fuel source for an alien spacecraft he was hired to reverse-engineer by the U.S. government to find a way to harness its power.

star 7.89
141 votes
The NASA Connection

#10 - The NASA Connection

Season 4 - Episode 5

NASA scientists, former astronauts and secret government files all point to the conclusion that there has been contact with extraterrestrial life in the past. Researchers examine this and other recent scientific evidence that may provide proof of alien contact in both the recent and ancient past.

star 7.87
217 votes
Alien Encounters

#11 - Alien Encounters

Season 6 - Episode 18

Stories of strange encounters accompany many of history's major events. Is it merely coincidence? Or might it be evidence of extraterrestrial intervention? In ancient myths from cultures around the globe, gods are often portrayed intervening in human affairs. The Sumerian gods are said to have created mankind; the Hebrews believe God gave Moses man's first laws, the Ten Commandments, and the angel Gabriel reportedly shared divine wisdom with the prophet Muhammad. But is it possible that these supernatural visitations were not actually the work of the gods--but rather a race of extraterrestrials using advanced technology to create and shape our civilization? Ancient Astronaut Theorists believe aliens may have helped guide mankind in the remote past--and that evidence for this stunning conclusion can be found sprinkled throughout human history.

star 7.84
115 votes
Aliens and the Creation of Man

#12 - Aliens and the Creation of Man

Season 3 - Episode 16

Why are humans so different from every other species on Earth? Did we evolve from ape--or is our intelligence the result of contact with an otherworldly source? Could unexplained advances in human evolution be the work of interstellar beings? 10,000-year-old petroglyphs link our ancient ancestors with star beings. Might evidence of alien contact help unlock the mystery of the Creation of Man?

star 7.82
217 votes
Directors: Kevin Burns
Writers: Brian Coughlin; Rich Monahan
The UFO Conspiracy

#13 - The UFO Conspiracy

Season 13 - Episode 1

In 2017, news breaks that the Department of Defense recently spent millions investigating reports of UFOs; the latest disclosure about a series of secret government UFO projects dating back decades.

star 7.82
267 votes
Aliens and Mega-Disasters

#14 - Aliens and Mega-Disasters

Season 4 - Episode 4

There are numerous historical, religious and mythic accounts of ancient civilizations being wiped out by volcanoes, earthquakes, floods, and meteors. Did god, or nature bring about such disasters? Or is it possible that celestial beings had a hand in the ancient world's catastrophic disasters?

star 7.82
194 votes
Aliens Among Us

#15 - Aliens Among Us

Season 7 - Episode 3

There are those who believe that the evolution of technology is not entirely of our own making. Ancient Astronaut theorists contend that it is by extraterrestrial design that we have become so technologically interconnected--and that we are being watched by beings from beyond our world. Do stories from the ancient past hold evidence of alien overseers? The Book of Enoch describes divine entities called the Watchers descending to Earth to monitor humankind and aid in our advancement. Inca legend states that the god Viracocha created humans and taught them astronomy,

star 7.82
211 votes
The Mystery of Puma Punku

#16 - The Mystery of Puma Punku

Season 4 - Episode 6

At nearly 14,000 years old, the ruins of Puma Punku are the oldest and most baffling on the face of the Earth. No one knows who designed and built this complex of sophisticated inter-locking blocks, and then vanished. Researchers investigate the ruins on-location in Peru and present new computer analyses. Forensic evidence on the ground, together with local myths and legends, suggest this site may have been designed and even once inhabited by a species of extraterrestrials.

star 7.81
234 votes
Area 52

#17 - Area 52

Season 13 - Episode 6

A look at whether or not Area 51's notoriety acts as a cover-up to much bigger, top-secret extraterrestrial experiments taking place at multiple locations.

star 7.81
207 votes
Return to Antarctica

#18 - Return to Antarctica

Season 14 - Episode 1

Has Antarctica served as a home base for extraterrestrial visitors to Earth for thousands of years? As human exploration of the frozen continent increases, are we about to come face to face with both the ruins of an ancient civilization buried under the ice -- and perhaps even aliens that still inhabit the frozen continent to this day?

star 7.81
191 votes
The Great Flood

#19 - The Great Flood

Season 7 - Episode 8

It is a story told in more than twelve hundred cultures around the world–the gods sent a great flood to wipe out humanity for its disobedient and wicked ways. Do these numerous creation myths point to an actual deluge, one that engulfed the world and spared only a chosen few? New evidence suggests that many fabled aspects of these flood myths may, in fact, be true. From traces of a major meteor impact in the Indian Ocean, to a worldwide ash layer, and even remnants of Noah’s grave site, scientists are starting to put the pieces of a very deadly puzzle together–a puzzle that some believe was created by extraterrestrial beings. Did humanity narrowly escape extinction? And are the ancient stories correct–that alien beings are the reason we survived? Ancient Astronaut Theorists believe they are–and that celestial beings are poised to save us again when another catastrophe sweeps across the Earth.

star 7.81
195 votes
City of the Gods

#20 - City of the Gods

Season 12 - Episode 7

Researchers suggest that the ancient site of Teotihuacan in central Mexico was once home to a highly advanced, perhaps extraterrestrial, civilization; excavations at Teotihuacan have unearthed discoveries out of place in the ancient world.

star 7.80
469 votes
Alien Messages

#21 - Alien Messages

Season 7 - Episode 7

Researchers discuss the possibility that some strange and cryptic communications can help us unlock the mysteries of the universe and contact extraterrestrial beings.

star 7.78
190 votes
Voices of the Gods

#22 - Voices of the Gods

Season 12 - Episode 11

India's Sanskrit texts are filled with incredible stories about advanced technology in the ancient world. Highly complex building techniques, brain surgery, flying crafts, and even nuclear physics are described with uncanny accuracy. Hindu scholars attribute this knowledge to a time when "gods" walked among men. Might this period of time actually be referring to an age when extraterrestrials inhabited the planet? Giorgio A. Tsoukalos travels to India to further explore the Sanskrit texts, as well as the structures and technology that have stood the test of time. From a temple that inexplicably survived a major earthquake to evidence of ancient brain surgery and instructions for advanced flying machines, Giorgio studies the sacred knowledge that is said to have come directly from the voices of the gods.

star 7.78
368 votes
Alien Resurrections

#23 - Alien Resurrections

Season 7 - Episode 6

Throughout history, incredible stories have been told of the dead rising from their graves, mummies journeying into the afterlife, and people on the brink of death mingling with deceased relatives in a celestial netherworld. Are they simply legends--or could some of these stories actually be true? From Jesus and Elijah to mummies and zombies, our culture is filled with accounts of beings who are able to lift the veil between life and death. And even today, scientists are trying to mimic this by suspending death in the operating room for hours at a time. Haitian ...

star 7.78
176 votes
Aliens and Dinosaurs

#24 - Aliens and Dinosaurs

Season 4 - Episode 10

Angkor Wat, Cambodia, is the world’s largest ancient religious temple. Within its megalithic ruins, researches have discovered a depiction of a species of dinosaur – a stegosaurus. But how could the ancients have had knowledge of animals that mainstream science says died out millions of years ago? Why are dinosaurs extinct? Did an alien race of beings kill off the dinosaurs to make room for humankind?

star 7.78
216 votes
The Shamans

#25 - The Shamans

Season 6 - Episode 9

Throughout history, spiritual leaders known as shamans have healed, protected and advised their people. But are they simply putting on elaborate ceremonies? Or could they be in contact with extraterrestrial realms? The Mongol army crushed their enemies and built a massive empire with the help of powerful shamans who could manipulate the weather. Amazonian shamans believe otherworldly beings taught them how to create a powerful brew that allows them to travel beyond Earth to gain knowledge. And on the desert plains of the Kalahari, the San Bushmen practice elaborate trance dances that unlock supernatural capabilities in their healers. Can shamans really communicate with otherworldly beings? Is it possible that through these spiritual mediators, extraterrestrials were able to influence mankind in the distant past? And could such celestial communication continue even today?

star 7.77
150 votes