Episode guide
Ancient Aliens: Season 21
17 episodes · premiered Feb 6, 2025
TMDB has no overview for this season.
- Episode 1: The Top Ten Extraordinary Discoveries Feb 7, 2025 · 42m 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…
- Episode 2: The Top Ten Mysterious Monoliths Feb 14, 2025 · 42m 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…
- Episode 3: The Top Ten UFO Crashes Feb 21, 2025 · 42m 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…
- Episode 4: The Top Ten Unexplained Technologies Feb 28, 2025 · 42m 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…
- Episode 5: The Top Ten Secret Projects Mar 7, 2025 · 1h 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…
- Episode 6: The Top Ten Mysterious Mountains Mar 14, 2025 · 1h 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…
- Episode 7: Mysteries of the Aztecs Mar 21, 2025 · 1h 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…
- Episode 8: The Glowing Orb Phenomenon Mar 28, 2025 · 1h 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…
- Episode 9: The Legacy of J. Allen Hynek Aug 29, 2025 · 1h 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…
- Episode 10: The Volcano Factor Sep 5, 2025 · 1h 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…
- Episode 11: The Birdman Mystery Sep 12, 2025 · 1h 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…
- Episode 12: The Abduction Files Sep 19, 2025 · 1h 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…
- Episode 13: The Giants Oct 2, 2025 · 1h 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…
- Episode 14: Aliens in Our Midst Oct 9, 2025 · 1h 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…
- Episode 15: Britain's UFO Files Oct 16, 2025 · 1h 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…
- Episode 16: Mysteries of the Norse Gods Oct 23, 2025 · 1h 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…
- Episode 17: Secrets of Japan Nov 6, 2025 · 1h 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…