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s22e16 · 2026-08-14 · 02:00
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Ancient Aliens
History Documentary
What it is
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?
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Episode guide
23 this season · 346 totals21e01 The Top Ten Extraordinary Discoveries 2025-02-08 02:00
The Top Ten Extraordinary Discoveries
Ancient Aliens is counting down ten of history's most astonishing discoveries – breakthroughs that challenge traditional beliefs about human history. From a lost city hidden in the Andes to mysterious metal spheres that are not of this world and a sunken city that was said to be the home of the gods, could these discoveries provide proof of extraterrestrial contact?
s21e02 The Top Ten Mysterious Monoliths 2025-02-15 02:00
The Top Ten Mysterious Monoliths
Ancient Aliens is counting down the world's top ten most mysterious monoliths, from a 500-ton stone believed to represent an ancient UFO, to giant statues said to have been created with advanced technology, and ornate pillars that depict otherworldly visitors. Could these extraordinary standing stones provide evidence of extraterrestrial visitation?
s21e03 The Top Ten UFO Crashes 2025-02-22 02:00
The Top Ten UFO Crashes
Ancient Aliens is counting down ten of the most compelling UFO crashes that have been reported across the globe. From an acorn-shaped object that crashed in the woods of rural Pennsylvania, to a mysterious craft that washed ashore in Japan, and an earth-shaking impact in Britain that defies explanation, are these mysterious events proof that our planet has been visited by extraterrestrials?
s21e04 The Top Ten Unexplained Technologies 2025-03-01 02:00
The Top Ten Unexplained Technologies
Ancient Aliens is counting down ten of the most astonishing--and unexplainable--technologies in history. From mysterious golden orbs discovered in Mexico, to a sacred wooden box that could communicate with the heavens, and an ancient tomb that is said to depict an astronaut, might these sensational artifacts be evidence of otherworldly contact?
s21e05 The Top Ten Secret Projects 2025-03-08 02:00
The Top Ten Secret Projects
Ancient Aliens is counting down ten of history's most compelling -- and covert -- projects that study the UFO phenomenon. From clandestine government organizations to agents that silence UFO witnesses and secret programs to reverse-engineer alien technology, are these mysterious projects evidence of contact with extraterrestrials?
s21e06 The Top Ten Mysterious Mountains 2025-03-15 01:00
The Top Ten Mysterious Mountains
Ancient Aliens is counting down ten mysterious mountains that are notorious for otherworldly phenomena. From a summit in Sri Lanka that is said to be a portal to other worlds, a volcano in Washington that was at the center of a famous UFO sighting, and a mesa in New Mexico believed to contain an alien base, could these strange peaks provide evidence of extraterrestrial contact?
s21e07 Mysteries of the Aztecs 2025-03-22 01:00
Mysteries of the Aztecs
The Aztecs built one of the world's most powerful and feared empires, and they claimed that they were guided by a pantheon of more than a thousand gods who came to Earth from different parts of the universe. Could the incredible story of their rise to power – and their sudden demise – reveal a history of extraterrestrial intervention in Mesoamerica?
s21e08 The Glowing Orb Phenomenon 2025-03-29 01:00
The Glowing Orb Phenomenon
Across the globe, reports of mysterious glowing orbs are on the rise. Their movements frequently defy the laws of physics, and now they are even being reported near military bases, ships, and nuclear weapon facilities. Do they represent a non-human intelligence? And if so, why are they here?
s21e09 The Legacy Of J. Allen Hynek 2025-08-30 01:00
The Legacy Of J. Allen Hynek
Dr. J. Allen Hynek is best known as the notorious government UFO debunker who became one of the founding fathers of ufology. Was Dr. Hynek right when he ultimately concluded that there is a non-human intelligence on Earth?
s21e10 The Volcano Factor 2025-09-06 01:00
The Volcano Factor
Volcanoes are Mother Nature's most fearsome and volatile creation. They have inspired countless myths and legends, but curiously, they are also major hotspots for UFO sightings.
s21e11 The Birdman Mystery 2025-09-13 01:00
The Birdman Mystery
Throughout the ancient world, there are depictions of mysterious figures that appear to be half human and half bird. In many cultures, they are revered as divine and have magical abilities.
s21e12 The Abduction Files 2025-09-20 01:00
The Abduction Files
All over the world, there are people who claim they have been abducted by aliens. Since the 1970s, a growing number of researchers have dedicated their lives to uncovering what is behind this disturbing phenomenon.
s21e13 The Giants 2025-10-03 00:00
The Giants
Thousands of years ago, people all over the world described encounters with enormous, human-like beings, and some archaeologists even claim to have found skeletons of extraordinary size. Could it be that the giants of myth and legend, truly existed?
s21e14 Aliens In Our Midst 2025-10-10 00:00
Aliens In Our Midst
In the age of smartphones and social media, more evidence of otherworldly activity has come to light than ever before. From a giant "shadow monster" witnessed outside a Miami mall to reports of ET encounters in Las Vegas.
s21e15 Britain's UFO Files 2025-10-17 00:00
Britain's UFO Files
From ancient sites like Stonehenge to the crop circle phenomenon and modern-day UFO sightings, Great Britain is a place of countless mysteries. Could it be that throughout history, this island has been a destination for extraterrestrial visitors?
s21e16 Mysteries Of The Norse Gods 2025-10-24 00:00
Mysteries Of The Norse Gods
The ancient legends of the Norse read like modern science-fiction, with powerful gods wielding incredible weapons and high technology. Could it be that these mythological tales are based on real encounters with extraterrestrial beings?
s21e17 Secrets Of Japan 2025-11-07 02:00
Secrets Of Japan
Japan is a land rich with ancient mysteries, and recently, it has also become known as a UFO hotspot. Could it be, as Ancient Astronaut Theorists suggest, that this island nation has a long history of extraterrestrial activity?