Episode Guide

The Top Ten Extraordinary Discoveries

This countdown episode revisits ten discoveries that Ancient Aliens has examined over the years, beginning with Oumuamua, the cigar-shaped interstellar object detected by astronomers at Hawaii's Haleakala Observatory in October 2017. Ancient astronaut theorists point to its unusual elongated shape and unexplained acceleration as potential evidence of extraterrestrial technology, drawing parallels to historical UFO sightings. The episode also features the BeLaU Spheres—tiny metallic beads retrieved from the Pacific Ocean floor in 2023 by Harvard astrophysicist Dr. Avi Loeb, who believes they came from an interstellar meteor unlike any that's landed on Earth. Other entries in the countdown include a lost Andean city, a sunken site claimed as the home of gods, and additional discoveries spanning archaeology, astronomy, and physics.

The Top Ten Mysterious Monoliths

Ancient Aliens counts down ten massive stone monuments across the globe, suggesting they may reveal extraterrestrial intervention in Earth's ancient past. The episode features monuments like England's Rudston Monolith, a 40-ton standing stone that Tim Brennan and David Childress link to centuries of reported light phenomena and alleged Earth energy currents called ley lines, and Japan's Ishi no Hoden, a 500-ton carved megalith nicknamed "the Floating Stone" that ancient lore claims resembles a ship that flew through the sky. Ancient astronaut theorists including Andrew Collins propose these precisely placed stones weren't simply religious markers but technological devices created with—or inspired by—contact with otherworldly beings, pointing to their massive scale and alignment along ley line convergence points as evidence of knowledge beyond what ancient cultures supposedly possessed.

The Top Ten UFO Crashes

This countdown episode surveys ten reported UFO crash incidents spanning from ancient times to the modern era, arguing that the consistency and global distribution of such accounts suggest extraterrestrial visitation. The episode highlights the Dropa Stones—reportedly 716 disc-shaped objects discovered in caves in China's Baian-Kara-Ula Mountains in 1938, allegedly bearing microscopic inscriptions telling of beings called "Dropas" who crash-landed around 10,000 BC—and the 1803 Utsuro Bune incident in Japan, where fishermen reportedly found a metallic, acorn-shaped vessel washed ashore containing a woman with unusual features and clothing. Ancient astronaut theorists like Giorgio Tsoukalos present these cases as part of a pattern suggesting that advanced craft have been falling to Earth for millennia, with the Dropa Stones potentially documenting "one of the earliest UFO encounters in all of ancient history."

The Top Ten Unexplained Technologies

This countdown episode revisits ten artifacts that ancient astronaut theorists argue may represent advanced or extraterrestrial technology. At number ten, the Dendera light bulb—a carving in Egypt's 2,000-year-old Hathor Temple—shows what Giorgio Tsoukalos and engineers interpret as an incandescent bulb complete with filament, cable, and power source. Theorists note the surrounding hieroglyphics reference a "bringer of light" and argue the image solves a longstanding puzzle: how Egyptians illuminated deep underground chambers covered in hieroglyphics without soot from torches. At number nine, the Baghdad Battery—terra-cotta pots with copper cylinders and iron rods discovered in 1938—appears designed to generate electricity more than 1,800 years before modern batteries, potentially providing the power source for such ancient lighting systems.

The Top Ten Secret Projects

This countdown episode revisits ten classified government projects that Ancient Aliens has explored over the years, arguing they may constitute evidence of official contact with extraterrestrials. The list includes the alleged 1947 Roswell crash in New Mexico, where retired Army Colonel Philip J. Corso later claimed military scientists reverse-engineered alien debris into technologies like silicon chips and fiber optics. Also featured is Majestic 12, a purported clandestine committee revealed in a 1952 memo sent to President-elect Eisenhower, which researcher Jaime Shandera received anonymously in 1984. Ancient astronaut theorists suggest these and eight other covert programs represent decades of government efforts to study and exploit extraterrestrial technology while maintaining public secrecy.

The Top Ten Mysterious Mountains

This countdown episode revisits ten mountains that ancient astronaut theorists believe may serve as extraterrestrial bases or portals. At number ten, Mount Adams in Washington gained fame when pilot Kenneth Arnold reported nine disc-shaped objects flying at 1,200 miles per hour before vanishing into the mountain in 1947—a sighting that introduced the term "flying saucer" to popular culture. Number nine features Mount Archuleta in New Mexico, where the nearby town of Dulce experienced numerous cattle mutilations and UFO reports in the 1970s. Geologist Phil Schneider claimed he worked on constructing a secret subterranean military base inside the mountain, fueling speculation about hidden alien facilities. The episode also promises to explore Adam's Peak in Sri Lanka, described as a divine portal, alongside other peaks associated with mysterious lights and unexplained phenomena.

Mysteries of the Aztecs

This episode examines whether the rapid rise and sudden fall of the Aztec Empire—which emerged in the Valley of Mexico in 1325 AD and quickly dominated Mesoamerica from Central Mexico to Honduras—might reveal evidence of extraterrestrial intervention. Ancient astronaut theorists point to the Aztecs' claim that over a thousand gods guided their civilization, gods they described as arriving from different parts of the universe and waging a cosmic war that determined humanity's fate. The episode suggests that the Aztecs' advanced understanding of mathematics and astronomy, their sophisticated urban planning, and their pyramid-building capabilities could indicate contact with otherworldly visitors who passed down knowledge to this expansionistic culture that conquered and renamed the territories of the Mixtec, Zapotec, and Maya civilizations.

The Glowing Orb Phenomenon

This episode examines a reported surge in sightings of glowing orbs—luminous, spherical phenomena that witnesses claim can hover motionless before accelerating at impossible speeds. Ancient astronaut theorists, including those interviewed for the episode, distinguish these orbs from traditional "nuts and bolts" UFOs, describing them instead as plasma-like balls of light that appear intelligently controlled. The phenomenon gained widespread attention during late 2024 sightings over New Jersey, where witnesses reported both large drones and smaller, spherical lights performing maneuvers—such as right-angle turns and sudden acceleration—that seemed to defy conventional aircraft capabilities. In January 2025, the U.S. government attributed the drone activity to FAA-authorized research, but ufologists argue the orbs represent something categorically different. The episode highlights reports near military installations and nuclear facilities as evidence of non-human intelligence monitoring sensitive sites.

The Legacy of J. Allen Hynek

This episode explores the transformation of Dr. J. Allen Hynek, an astronomer and astrophysicist who began his career as a U.S. Air Force consultant tasked with debunking UFO reports in the 1940s, only to become what ancient astronaut theorists call the "founding father of modern ufology." The show's contributors, including Luis Elizondo and Travis Taylor, argue that Hynek's scientific credibility and his shift from skeptic to believer lend legitimacy to the study of unidentified aerial phenomena. The episode highlights Hynek's classification systems for UFO encounters, his documentation of reports from 133 countries, and his assertion that a "real phenomenon of some sort is going on" based on testimony from technically trained observers. The show also notes Hynek's interest in Erich von Däniken's ancient astronaut theories, with contributor Phil Imbrogno claiming Hynek considered the possibility that extraterrestrials influenced early human civilization.

The Volcano Factor

This episode explores the persistent connection between volcanoes and UFO sightings, centered on footage from webcams monitoring Mexico's Popocatépetl volcano. Ancient astronaut theorists point to multiple incidents captured between 2016 and 2017, including glowing orbs flying toward the crater and what appears to be a small craft emerging from the summit before transforming and shooting skyward. The episode draws parallels to Kenneth Arnold's famous 1947 sighting near Mount Rainier, where he reported nine craft flying into Mount Adams volcano at extraordinary speeds. Theorists argue these volcanic hotspots may serve as extraterrestrial bases or portals, noting that cultures worldwide—from Mexico's Muisca people to communities around Indonesia's Mount Merapi—have long associated volcanoes with gods, spirits, and gateways to other realms.

The Birdman Mystery

This episode explores depictions of half-human, half-bird figures that appear across ancient cultures worldwide, asking whether they represent mythological imagination or evidence of actual encounters with otherworldly beings. Ancient astronaut theorists point to specific examples like the Anunnaki gods of Sumeria, shown with avian features, and the "birdman burial" at Cahokia Mounds near Collinsville, Illinois, where Mississippian people interred a male on a platform shaped from over 10,000 shell beads arranged as a falcon. The episode features testimony from former Navajo Nation Ranger Jonathan Dover, who reports consistent modern sightings of winged humanoids on the reservation, and examines kachina traditions among Pueblo peoples of the American Southwest. Theorists argue these widespread traditions, combined with reported contemporary encounters, suggest birdmen may have been physical visitors from the sky who shared knowledge with early humans.

The Abduction Files

This episode examines accounts of alleged alien abduction, tracing how artist Budd Hopkins became a pioneering researcher after his 1975 Village Voice article about a UFO sighting in New Jersey triggered hundreds of responses from people claiming similar experiences. Ancient astronaut theorists argue that Hopkins' documentation of experiencers like Peter Robbins—who reported seeing disc-shaped objects over his home in 1961 and whose sister Helen described being taken aboard a craft by small beings—reveals a pattern suggesting extraterrestrial intervention stretching back thousands of years. The episode presents accounts of people describing medical procedures, implants, and missing time, with researchers claiming these consistent details across cultures and decades point to an ongoing alien agenda involving humanity.

The Giants

This episode examines the global persistence of giant legends and explores whether they might reference real, extraordinarily large humans. The central focus is a geophysical survey conducted along the Euphrates River by German archaeologist Jörg Fassbinder's team, which detected a large underground tomb near ancient Uruk—possibly, the episode suggests, the burial site of King Gilgamesh. According to the 4,000-year-old Epic of Gilgamesh, this Sumerian king stood 11 cubits tall, roughly 17 feet, and was buried beneath the Euphrates exactly where the tomb was found. Ancient astronaut theorists including Giorgio Tsoukalos and William Henry argue that nearly every culture—from Australian Wandjina creator gods to the Greek Cyclops to descriptions of a 12-foot-tall Buddha in Vedic texts—preserves memories of giant beings, suggesting a "common denominator" rooted in actual encounters.

Aliens in Our Midst

This episode examines whether the proliferation of smartphone footage and recent government disclosures indicate an extraterrestrial presence on Earth. Ancient astronaut theorists point to a 2023 Congressional hearing where investigative journalist Michael Shellenberger testified about "Immaculate Constellation," an alleged top-secret military database reportedly containing terabytes of high-resolution UAP imagery. The hearing featured testimony from former intelligence officer Luis Elizondo, Rear Admiral Tim Gallaudet, and NASA's Michael Gold, all asserting the government has withheld UAP evidence from the public. Proponents argue this follows a pattern established when the Pentagon's Advanced Aerospace Threat Identification Program (AATIP) was revealed by the New York Times in 2017, leading to the release of Navy videos including the "Tic Tac" and "Gimbal" footage. The episode also highlights viral incidents like a purported "shadow monster" outside a Miami mall and repeated Las Vegas sightings.

Britain's UFO Files

This episode argues that Great Britain has served as a consistent destination for extraterrestrial visitors across millennia, from ancient monuments like Stonehenge to modern military encounters. Ancient Aliens theorists point to November 2024 drone incursions over four U.S. Air Force bases in the U.K., where orbs performed unusual maneuvers that some interpret as possible extraterrestrial surveillance. The episode highlights the 2008 release of 60,000 Ministry of Defence files on UFO investigations, which theorists claim proves official interest far exceeding public statements. The most famous case discussed is the December 1980 Rendlesham Forest incident at RAF Woodbridge, where military personnel including Deputy Base Commander Lieutenant Colonel Halt documented encounters with a lit object over multiple nights. Similar radar detections occurred at nearby RAF Bentwaters in 1956, suggesting to theorists a pattern of anomalous activity around sensitive military installations.

Oceania's Mysteries

This episode examines whether Norse mythology—with its descriptions of Odin's all-seeing throne, technologically crafted weapons like Thor's hammer forged by dwarves, and the Bifröst bridge connecting realms—might preserve memories of extraterrestrial contact rather than purely symbolic tales. Ancient astronaut theorists including Giorgio Tsoukalos and Nick Pope suggest that Norse gods wielding "advanced technology" and traversing what Pope describes as possibly "a sort of folkloric way of explaining a wormhole" parallel modern UFO contactee reports. William Henry argues that contemporary encounters with supposed Nordic-type extraterrestrials "precisely match" the mythology developed across Scandinavia—the region encompassing Denmark, Norway, Sweden, Finland, and Iceland where Germanic peoples merged with indigenous cultures during the Bronze Age to form Norse civilization.

The Glowing Orbs

This episode examines Japan's recent classification as a UFO hotspot through the lens of alleged sightings at the Fukushima Daiichi Nuclear Power Plant. Ancient astronaut theorists highlight videos showing luminous golden orbs hovering over the damaged reactor following both the catastrophic 2011 tsunami and a 2021 earthquake. Giorgio Tsoukalos and Travis Taylor argue these objects demonstrate technological intelligence, while the episode connects modern sightings to Japan's historical accounts of mysterious aerial lights. The formation of an 80-member bipartisan parliamentary panel in May 2024 to investigate unidentified aerial phenomena, along with Defense Minister Yasukazu Hamada's authorization for the Air Self-Defense Force to shoot down UFOs over sensitive infrastructure, frames Japan's official response as uniquely serious compared to other nations.

Mysterious Volcanoes

Explores volcanic sites with alien activity.

Great Britain's Ancient Mysteries

Investigates ancient British sites with alien connections.