Watch Ancient Aliens

In this series, investigators looks for evidence to back up theories that aliens visited Earth long ago and helped humans to build advanced civilizations. Also addressed is the possibility that aliens are still around, but their presence is being kept secret by a shadowy global conspiracy.

Friday 9:00 PM et/pt on History
14 Seasons, 181 Episodes
April 20, 2010
Documentary & Biography
Cast: Robert Clotworthy, Giorgio Tsoukalos, David Childress, Jonathan Young
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Ancient Aliens Full Episode Guide

  • Over the past 20 years, thousands of potentially habitable exoplanets have been discovered outside our solar system. Could some of them be home to intelligent extraterrestrial life? Perhaps even alien beings that have visited Earth?

  • Are governments around the world preparing mankind for the most startling event in human history

  • In 2019, millions responded to an internet post advocating to storm the gates of the world’s most top-secret military installation

  • Tattoos, piercings, and body modification account for a nearly one-billion-dollar industry. But are these practices being adopted by mainstream society as a bold form of self-expression or could it be motivated by a profound link to our ancestors? By studying these human hieroglyphs, might we uncover extraordinary secrets?

  • Divine substances were consumed by the gods but sometimes gifted to humans to impart great power or wisdom; could the food of the gods be sustenance for alien visitors and does it lend insight into humanity's future.

  • A shocking DNA study released in 2018 reveals that the original builders of Stonehenge mysteriously vanished. But where did they go? Could Stonehenge's mysterious "Bluestone circle" have activated a portal that transported the ancient culture back to their former home amongst the stars?

  • A mountain in Northern Italy witnesses strange sightings in the sky.

  • The UFOs are reported to be present at nuclear facilities all over the world.

  • Examining some ancient world structures and the possibility they were designed as messages for extraterrestrial visitors.

  • The native Hawaiians trace their ancestry to beings from the Pleiades star system called the Akua. Could these islands have once been inhabited by extraterrestrials?

  • Could paranormal activity be explained by beings entering our world from other dimensions? According to some Ancient Astronaut theorists, entities that have been described as ghosts, angels, and extraterrestrials are actually visitors from unseen realms

  • It is discussed whether extraterrestrials are altering human DNA and repopulating the Earth with alien/human hybrids. A trail of evidence is followed from ancient cultures to modern-day animal mutilations and alien abductions.

  • In 2016, scientists made the astonishing discovery that 30 percent of all protein adaptations since humans’ divergence with chimpanzees have been driven by viruses. Could ancient aliens have shaped human evolution by introducing viral epidemics on Earth? And if so, for what purpose? Are they making us more like them?

  • Serpent gods are found in the religious traditions of Mesopotamia, Central and South America, India, China and Japan.

  • Investigating if ancient Druids travel to New England and New York's Hudson Valley centuries ago, bringing with them the beliefs and technologies of their alien mentors, the Shining Ones of Irish myth; and if they left behind vital clues in the form of mysterious stone structures still visible on the landscape.

  • Looking into the secrets of the Mayans and how they are connected to extraterrestrial beings.

  • Did aliens from a tiny star visit humans in the past, imparting the knowledge of civilization? And did they leave behind a vital clue in the form of a word that's embedded in languages all over the globe?

  • According to physicist Bob Lazar, "Element 115" is the fuel source for an alien spacecraft he was hired to reverse-engineer by the U.S. government--and if we can harness its awesome power, it will change our world forever.

  • Satellite images have revealed a giant face that appears to be carved into the Earth in Alberta, Canada, which has now become known far and wide as "The Badlands Guardian." Exploring the idea that it could be part of a cosmic communication system, one that when deciphered will link this planet to its extraterrestrial origins.

  • Exploring Antarctica and the truth behind the rumors of aliens inhabiting the continent.

  • As humanity prepares to establish colonies beyond Earth, are we simply actually returning to mankind’s extraterrestrial past?

  • Erich von D niken’s Chariots of the Gods? challenged everything we thought we knew about mankind’s history, suggesting that aliens visited Earth in the distant past. Fifty years after the book’s publication, is he about to be proven right?

  • A look at the possibility of intelligent robots being a threat to humanity or the next step in human evolution.

  • A secret alliance hidden in plain sight. Joint space missions with undisclosed agendas.

  • Ancient astronaut theorists Giorgio A. Tsoukalos and David H. Childress explore a Polynesian land of bizarre figures and forbidden places in search of what could be the ultimate evidence of mankind's extraterrestrial origins.

  • Millions of people around the world have claimed to be abducted by extraterrestrials. Are these extraordinary accounts some form of mass psychological delusion? Or, might these stories actually be true?

  • Treasure hunter Marty Lagina and ancient astronaut theorist Giorgio A. Tsoukalos explore the ancient ruins of Sardinia in the Mediterranean Sea to look for clues of an extraterrestrial past.

  • Was Egypt home to Earth's earliest extraterrestrial visitors? Ancient Astronaut theorist Giorgio A. Tsoukalos explores the latest scientific discoveries at some of the world's most ancient places to find evidence that extraterrestrials visited Egypt in the distant past.

  • Could giant ancient drawings found etched into the desert floor be part of an ancient alien code?

  • How humanity prepares in case of encountering alien life is brought into question.

  • Researches claim there are hidden messages that can be found within the works of Leonardo da Vinci--and other art throughout history--that may reveal an extraterrestrial influence.

  • In 2017, it was revealed that the Department of Defense recently spent millions investigating reports of UFOs. This is the latest disclosure about a series of secret government UFO projects dating back decades, but many of their findings have never been released to the public. Could the truth about an extraterrestrial presence on Earth be part of a UFO Conspiracy?

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