Ancient Aliens Season 21
Ancient Aliens Season 21

Ancient Aliens Season 21: The Top Ten Extraordinary Discoveries
01. The Top Ten Extraordinary Discoveries
Feb 07, 2025

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?

Ancient Aliens Season 21: The Top Ten Mysterious Monoliths
02. The Top Ten Mysterious Monoliths
Feb 14, 2025

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?

Ancient Aliens Season 21: The Top Ten UFO Crashes
03. The Top Ten UFO Crashes
Feb 21, 2025

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?

Ancient Aliens Season 21: The Top Ten Unexplained Technologies
04. The Top Ten Unexplained Technologies
Feb 28, 2025

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?

Ancient Aliens Season 21: The Top Ten Secret Projects
05. The Top Ten Secret Projects
Mar 07, 2025

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?

Ancient Aliens Season 21: The Top Ten Mysterious Mountains
06. The Top Ten Mysterious Mountains
Mar 14, 2025

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?

Ancient Aliens Season 21: Mysteries of the Aztecs
07. Mysteries of the Aztecs
Mar 21, 2025

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?

Ancient Aliens Season 21: The Glowing Orb Phenomenon
08. The Glowing Orb Phenomenon
Mar 28, 2025

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?

Ancient Aliens Season 21: The Legacy of J. Allen Hynek
09. The Legacy of J. Allen Hynek
Aug 29, 2025

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?

Ancient Aliens Season 21: The Volcano Factor
10. The Volcano Factor
Sep 05, 2025

Volcanoes have inspired countless myths and legends, but curiously, they are also major hotspots for UFO sightings; is it possible that these geological formations, which can generate great energy, are attracting otherworldly visitors?

Ancient Aliens Season 21: The Birdman Mystery
11. The Birdman Mystery
Sep 12, 2025

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. But could these so-called "Birdmen" have truly existed? And if so, just what were they?

Ancient Aliens Season 21: The Abduction Files
12. The Abduction Files
Sep 19, 2025

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 uncover what is behind this disturbing phenomenon.

Ancient Aliens Season 21: The Giants
13. The Giants
Oct 02, 2025

Examining how thousands of years ago, people all over the world described encounters with enormous, human-like beings; exploring how some archaeologists claim to have found skeletons of extraordinary size; is it possible the giants actually existed?

Ancient Aliens Season 21: Aliens In Our Midst
14. Aliens In Our Midst
Oct 09, 2025

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.

Ancient Aliens Season 21: Britain's UFO Files
15. Britain's UFO Files
Oct 16, 2025

From ancient sites like Stonehenge to the crop circle phenomenon and modern-day UFO sightings, Great Britain is a place of mysteries; exploring if throughout history this island has been a destination for extraterrestrial visitors.

Ancient Aliens Season 21: Mysteries Of The Norse Gods
16. Mysteries Of The Norse Gods
Expected Oct 23, 2025

The ancient legends of the Norse read like modern science-fiction, with powerful gods wielding mythic weapons and high technology.