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An examination of possible encounters humans could have once colonies are established beyond Earth.

Ancient Aliens

Return to Mars

Erich von Däniken's "Chariots of the Gods?" suggests that aliens visited Earth in the distant past, and there are those who believe that he will be proven right.

The Alien Phenomenon

A look at whether intelligent robots are a threat to humanity or the next step in human evolution; as man and machine begin to merge, humanity could be fulfilling a destiny prepared for by aliens thousands of years ago.

The Artificial Human

UnexplJoin top investigators as they seek to uncover the truth behind some of the world’s greatest mysteries and cover-ups

UnXplained Zone

Ancient cultures from around the world believed that meteorites were sacred stones imbued with the power of the Gods; Ancient Astronaut theorists ask whether these space rocks could be pieces of extraterrestrial technology.

They Came From the Sky

A secret alliance hidden in plain sight; joint space missions; questions remain whether the U.S. and Russia have been working together from the very beginning of the Space Race in preparation for the ultimate extraterrestrial encounter.

Russia Declassified

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.

The Sentinels

Treasure hunter Marty Lagina and Ancient Astronaut theorist Giorgio A. Tsoukalos explore the bizarre statues, mysterious pyramids and gigantic structures left behind by one of the most mysterious cultures in the ancient world in Sardinia, Italy.

Island of the Giants

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.

Earth Station Egypt

A look at whether Area 51's notoriety acts as a cover-up for much bigger, top-secret extraterrestrial experiments taking place at multiple locations.

Area 52

Researchers study giant ancient drawings found etched into the desert floor, which may be a part of an ancient alien code.

The Desert Codes

Theorists speculate about the existence of black holes on Earth, which may explain strange disappearances and other inexplicable phenomena.

Earth's Black Holes

In 2017, a strange, cigar-shaped object enters the solar system from another star system, traveling in such an unusual trajectory it causes some astronomers to suggest that it could be an extraterrestrial craft.

The Alien Protocols

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Texts, archaeology and legend contain evidence of past human-extraterrestrial contact.

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Researchers claim hidden messages can be found within the works of Leonardo da Vinci, and other art throughout history, that may reveal an extraterrestrial influence.

S13 E2 | Da Vinci's Forbidden Codes