Schedule

Who are the beings with big heads and giant eyes that seem to have been visiting our planet for millennia? Known by researchers as the "greys," these mysterious beings have been depicted in rock-art and carved stone figures throughout the ages.

There are numerous historical, religious and mythic accounts of ancient civilizations being wiped out by volcanoes, earthquakes, floods, and meteors. Did god, or nature bring about such disasters?

For thousands of years, pyramids were the largest structures on Earth. The best known were constructed in Egypt and Central America, but others have been found all around the world, including in China, Africa and Indonesia.

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.

Ancient Aliens is counting down the top ten scariest encounters that just might be evidence of extraterrestrial visitation. Are these frightening encounters proof of extraterrestrial contact?

Throughout the world, ancient rites and rituals are believed to connect humans to another dimension. But just who--or what--are we communicating with?

Might the tools and technology of ancient builders have come from distant galaxies? Evidence suggests that an ancient mountaintop fortress in Peru was constructed with laser-like tools... temples at Vijayanagara India were built to harness cosmic energy.

Scientists are continually challenged by unidentified strains of bacteria with mysterious origins. Could some of our most crippling plagues and epidemics be traced to the darkest voids of space--or even extraterrestrial intervention?

Mysterious legends and crumbling ruins are all that is left of our planet's lost worlds. But could there be proof of ancient alien visitors hidden among the artifacts of civilizations that have long vanished?

Iron swords forged in blazing hot fires... Gunpowder with the power to tear apart human flesh... And rockets capable of destroying entire cities...

For centuries, legends and eyewitness accounts have told of a massive, hairy creature that roams the forest on two legs. But does Bigfoot actually exist?

For centuries, humanity has looked up at the Moon with a sense of wonder. But is the Moon just a rock floating in space? Or could it hold profound secrets--and perhaps even possess incredible powers? That is what we will try and find out.

Since the dawn of civilization, humanity has been fixated on predicting our own demise. Perhaps it will be asteroids, black holes, or something even more mysterious that will wipe us out. But is there anything we can do?

For thousands of years, people have believed in the existence of Satan, the embodiment of evil. Some believe he has the power to possess souls and create mayhem amongst humanity. But is Satan a myth?

Sunken ships filled with priceless cargo. Lost cities of gold. Ancient temples concealing untold riches. There's something about these hidden treasures that captures the human imagination. But are lost treasures merely the stuff of legend?

Throughout history, many have sought the lost Ark of the Covenant. How could such a coveted religious artifact just disappear? And is it possible that the Ark could actually be found?

Andy and Paul travel to Fayetteville, NC to investigate a man who has video evidence of his repeated alleged encounters with UAPs and to test his possible "quantum entanglement" abilities.

In 2016 a mysterious illness strikes dozens of government officials in Cuba. Over the next few years, hundreds more are afflicted. What is the true cause of the strange phenomenon known as "Havana Syndrome?"

It is humankind's most profound achievement: blasting off into the stars. But is it possible that our voyages into the cosmos are really a return to our true origins?

Scientists now know that seven human-like species lived alongside Homo sapiens for thousands of years. But why is it that only humans survived? Is it possible that we were the product of extraterrestrial experimentation?