Ancient Aliens: Season 15

The Mystery of Nan Madol

41min - Giorgio Tsoukalos and David Childress explore the mysterious chain of manmade islets in Micronesia's Nan Madol.

The Relics of Roswell

41min - In 1947 the U.S. military collected the debris of what they claimed was a crashed weather balloon outside of Roswell, New Mexico. But new evidence may prove that the wreckage actually belonged to an extraterrestrial spacecraft.

Destination Chile

41min - Chile boasts the highest number of annual UFO sightings of any nation on Earth. Now, incredible new footage of a strange craft has even the Chilean government asking if alien visitors are drawn to this part of the world.

The Power Of The Obelisk

41min - Scholars identify Egypt's obelisks as monuments to the pharaohs, while ancient astronaut theorists suggest they may power communication with the gods

The Mystery of the Stone Giants

41min - From Egypt to Easter Island, towering figures built by ancient man stand watch over the Earth. Are these stone giants simply a testament to humanity's past or could they depict visitors from another world?

The World Before Time

42min - Shocking new evidence reveals that advanced civilizations might have existed on Earth tens of thousands of years ago. Is it possible that a technologically advanced society thrived on Earth then?

They Came From The Pleiades

42min - In numerous ancient cultures throughout the world, stories were told of ancestors that came to Earth from the Pleiades star cluster. Could new scientific findings reveal that humankind's true origins lie not on Earth?

The Immortality Machine

42min - In the Mojave Desert, there is a structure built to bestow everlasting life--and according to the architect, the blueprint was provided by an extraterrestrial visitor.

The Shapeshifters

42min - Accounts of creatures that can shapeshift from one form into another can be found throughout history. Could striking similarities between the ancient stories and modern-day alien abduction accounts reveal that shapeshifters are real?

The Mystery of Skinwalker Ranch

42min - Nestled within a remote valley in Utah, is a ranch that some believe is a hotbed of strange, inexplicable phenomena. Could the bizarre activity have a connection to an alien entity known as the Skinwalker?

The Ultimate Guide to UFOs

42min - UFO witnesses have reported a wide variety of objects in Earth's skies--and not only in modern times, but for centuries. What might we learn from examining their shapes, sizes, and the way they maneuver?

Aliens and the Presidents

42min - The White House has consistently denied having any knowledge of alien craft visiting Earth, but presidential encounters with UFOs and other strange phenomena can be found going all the way back to George Washington.

The Top Ten Mysterious Islands

42min - Count down the world's top 10 mysterious islands, including sites said to be home to giants and islands that disappear into thin air.

Top Ten Alien Craft, The

42min - Count down the top ten alien craft, from V-shaped objects to orbs of light to flying saucers.

The Top Ten Alien Petroglyphs

42min - Count down the top ten alien petroglyphs around the world, from strange figures to flying craft and carvings of what appear to be astronauts.

Edgar Cayce: The Sleeping Prophet

43min - In the 1900s, a modern-day prophet Edgar Cayce became a worldwide sensation. He claimed to receive visions of both the past and future.

The New UFO Hunters

Top Ten Mysteries Of The Deep, The

42min - Count down the top ten mysteries of the deep, from sunken continents to supposed proof of the lost city of Atlantis.

Gods Of Greece, The

43min - Explore whether the Gods of Greece including Zeus, Apollo and Poseidon, were actually extra-terrestrial visitors to Earth.

The New Ufo Hunters

42min - In the 21st century, UFOs have gone from fringe science to mainstream obsession. Are we getting closer to understanding the strange events in the sky?

Power Of The Talisman

41min - For millennia, people have believed that everyday objects can possess hidden energy. These talismans are seen to provide protection and good fortune.