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The Evidence

Aired on Apr 20, 20101h 28m

If ancient aliens visited Earth, did they leave behind clues such as sophisticated aircraft, complex electrical grids and construction machinery? Are these examples of modern technology, or is there evidence that they existed thousands of years ago?

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The Visitors

Aired on Apr 27, 20101h 28m

If ancient aliens visited Earth, who were they, and where did they come from? Possible historic evidence and beliefs from around the world are examined, from the Dogon people of West Africa to the Hopi and Zuni of North America.

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The Mission

Aired on May 04, 20101h 28m

If ancient aliens visited Earth, what was their mission? From crop circles to Egyptian hieroglyphics, evidence may exist in multiple cultures throughout history suggesting that aliens came here to explore, excavate raw materials and more.

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Closer Encounters

Aired on May 18, 20101h 28m

Reports of encounters with strange beings and sightings of mysterious objects in the sky have occurred throughout history. Could these sightings, coming from every part of the world, be evidence that aliens have been with us all along?

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The Return

Aired on May 25, 20101h 26m

There is evidence that suggests we experienced alien contact in the 20th century. WWII Air Force planes were buzzed by mysterious balls of light, and the alleged crash of a flying saucer in Roswell, New Mexico propelled the world into the age of UFOs.

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Ancient Aliens

Aired on Mar 08, 20091h 30m

What if life on Earth began in outer space? Are monuments like Stonehenge and Easter Island the last remains of an ancient alien visitation? This special investigates a theory some believe cannot be true, but many agree cannot be ignored.