Ancient Aliens: Season 21

2025 · 17 episodes · ★ 8.4

What Season 21 of Ancient Aliens

Ancient Aliens is a History documentary created by Kevin Burns and narrated by Robert Clotworthy. It argues that, long ago, visitors from other worlds came to Earth and taught early humans architecture, language and technology. To back this up, the show brings together researchers, writers and UFO enthusiasts who link the pyramids of Egypt, Stonehenge and Pumapunku to religious texts, myths and legends. Each episode jumps from one site to another and presents every claim without critical analysis. The interviews and archival footage give ancient history the feel of a proven fact. Topics include lost cities, metal spheres, monoliths, birdmen, giants and secret UFO projects.

17episodes

Feb 6, 2025premiered

Nov 6, 2025Latest episode

15.8 hrtotal runtime

Season 21 Episodes

21x01 The Top Ten Extraordinary Discoveries
Feb 7, 2025 · 42 min
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?
21x02 The Top Ten Mysterious Monoliths
Feb 14, 2025 · 42 min
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?
21x03 The Top Ten UFO Crashes
Feb 21, 2025 · 42 min
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?
21x04 The Top Ten Unexplained Technologies
Feb 28, 2025 · 42 min
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?
21x05 The Top Ten Secret Projects
Mar 7, 2025 · 60 min
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?
21x06 The Top Ten Mysterious Mountains
Mar 14, 2025 · 60 min
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?
21x07 Mysteries of the Aztecs
Mar 21, 2025 · 60 min
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?
21x08 The Glowing Orb Phenomenon
Mar 28, 2025 · 60 min
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?
21x09 The Legacy of J. Allen Hynek
Aug 29, 2025 · 60 min
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?
21x10 The Volcano Factor
Sep 5, 2025 · 60 min
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?
21x11 The Birdman Mystery
Sep 12, 2025 · 60 min
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?
21x12 The Abduction Files
Sep 19, 2025 · 60 min
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.
21x13 The Giants
Oct 2, 2025 · 60 min
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?
21x14 Aliens in Our Midst
Oct 9, 2025 · 60 min
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.
Starring: Lynn Picknet
21x15 Britain's UFO Files
Oct 16, 2025 · 60 min
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.
Starring: Lynn Picknet
21x16 Mysteries of the Norse Gods
Oct 23, 2025 · 60 min
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?
21x17 Secrets of Japan
Nov 6, 2025 · 60 min
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?