Season 20

Puma Punku in Bolivia features stone blocks, each carved with precision; the blocks lie scattered across the landscape, confusing archaeologists as to what the ancient site might have been.

From biblical patriarchs to modern day alien abductees, throughout history, there have been people who claimed to have contact with otherworldly beings. And often bearing important messages for humanity. Could it be that they have been chosen to help carry out an extraterrestrial agenda?

Linda Moulton Howe, an acclaimed journalist, investigates unexplained phenomena like animal deaths, crop circles, and alien abductions over decades, potentially uncovering a new reality.

Deep beneath Egypt's sands, 24 enormous empty sarcophagi weigh over 70 tons each. Were these precisely carved stone boxes constructed by humans or otherworldly visitors.

Ancient cultures have myths about god-like beings guiding early humans to establish civilizations. Are there historical figures suggesting these otherworldly teachers actually existed?

Jacques Vallée, a scientist and author, explores revolutionary UFO theories challenging notions of alien life, aiming to unravel millennia-old mysteries in the skies.

Cutting-edge technologies propel humanity's ages-old pursuit of making contact with alien civilizations by enabling exploration of billions of stars.

UFOs crashed, alien entities recovered. Claims of extraterrestrial presence, government secrecy, discrediting whistleblowers. Examining if whistleblower accounts will be proven true as evidence emerges.

Exploring the ancient belief in stargates, portals through which extraterrestrial beings may have visited Earth from distant realms and dimensions. A search for evidence of their existence and the cosmic life they could reveal.

Considered the greatest civilization in ancient Americas, the Maya thrived for over 2,000 years. Newly discovered evidence challenges our understanding of this culture, suggesting they may have had contact with extraterrestrial visitors.

Throughout the world there are mysterious ancient stones shaped into perfect spheres. Many of them show clear evidence of being manmade and some completely defy explanation. Could the mystery of the stone spheres provide clues about humankind's alien past?

For thousands of years, Scotland has been an epicenter of otherworldly phenomena. It is home to mysterious ancient stone circles, stories of strange beings, and is a major hotspot for UFO sightings. Could it be that Scotland is a magnet for extraterrestrial visitors?

Along the Earth's north 37th parallel there have been so many reports of unidentified flying objects, animal mutilations, and other mysterious events that it has been dubbed The UFO Superhighway. Could there be something about this latitude that is attracting extraterrestrial visitors?

More than 7,000 years ago, the ancient Sumerians established what is considered the world's first civilization, and they credited their extraordinary achievements to their gods, the Anunnaki. But is it possible that these powerful beings were, in fact, extraterrestrial visitors to Earth?

Ancient Aliens is counting down the top ten most devastating disasters ever documented that might have an otherworldly connection, from a flying monster at a nuclear incident, a meteor that wiped out the dinosaurs, and a deadly virus that might be from another world. Could these disasters be proof of extraterrestrial contact?

Ancient Aliens is counting down ten of the most intriguing-and mysterious-symbols and codes found across the globe that just might contain proof of otherworldly contact. From glyphs in the Peruvian desert, to spiral petroglyphs embedded with advanced math, and a language with an otherworldly origin, could these codes unlock the secrets of our extraterrestrial past?

Ancient Aliens is counting down the top ten scariest encounters that just might be evidence of extraterrestrial visitation. From an encounter in rural Texas that left onlookers with unexplainable injuries, to mysterious cattle mutilations, and a man who was abducted in front of a group of people. Are these frightening encounters proof of extraterrestrial contact?

Ancient Aliens is counting down the top ten locations around the world that just might be hiding alien bases, including a cavern beneath the ice of Antarctica, a lake in China that is a hotspot for UFOs, and a pyramid under the slopes of Mt. Denali in Alaska. Are these locations proof that extraterrestrials are not only visiting our planet... but are hiding in plain sight?

For more than a decade, Ancient Aliens has collected dozens of reports of encounters with strange and mysterious beasts. Now, Ancient Astronaut Theorist Giorgio Tsoukalos takes a look back at The Top Ten Extraordinary Creatures we've investigated-creatures that just might provide compelling evidence of extraterrestrial visitation.

Ancient patriarch ascends mountain where celestial messengers impart wisdom from on high. Meanwhile, aquatic beings share metalworking secrets with Mediterranean craftsmen.