E11 • They Came From The Sky

E1 • The UFO Conspiracy

In 2017, it was revealed that the US Government spent millions investigating reports of UFOs. Could the truth about an extraterrestrial presence on Earth be part of a UFO conspiracy?

1h 22m • 2016

In 2017, it was revealed that the US Government spent millions investigating reports of UFOs. Could the truth about an extraterrestrial presence on Earth be part of a UFO conspiracy?

E2 • Da Vinci's Forbidden Codes

Researchers 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.

41m • 2016

Researchers 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.

E3 • The Alien Protocols

In 2017, an object entered our solar system in such an unusual trajectory that it caused astronomers to suggest that it could be extraterrestrial. Which brings up an important question - will we have a plan for what to do if we encounter alien life?

41m • 2016

In 2017, an object entered our solar system in such an unusual trajectory that it caused astronomers to suggest that it could be extraterrestrial. Which brings up an important question - will we have a plan for what to do if we encounter alien life?

E4 • Earth's Black Holes

Could black holes exist not just in outer space, but here on Earth? And if so, could Earth's black holes have caused strange disappearances and other inexplicable phenomena for centuries?

41m • 2016

Could black holes exist not just in outer space, but here on Earth? And if so, could Earth's black holes have caused strange disappearances and other inexplicable phenomena for centuries?

E5 • The Desert Codes

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

41m • 2016

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

E6 • Area 52

Could Area 51's notoriety act as a cover up to much bigger, top-secret extraterrestrial experiments taking place at multiple locations?

41m • 2016

Could Area 51's notoriety act as a cover up to much bigger, top-secret extraterrestrial experiments taking place at multiple locations?

E7 • Island Of The Giants

Could the ancient ruins of Sardinia hold clues to an extraterrestrial past? Marty Lagina and Giorgio A. Tsoukalos explore bizarre statues, mysterious pyramids and gigantic structures left by one of the most mysterious cultures in the ancient world.

41m • 2016

Could the ancient ruins of Sardinia hold clues to an extraterrestrial past? Marty Lagina and Giorgio A. Tsoukalos explore bizarre statues, mysterious pyramids and gigantic structures left by one of the most mysterious cultures in the ancient world.

E9 • The Sentinels

Seven stone giants stand guard over a Pacific island. But what are they protecting – and from whom? Ancient Astronaut theorists Giorgio A Tsoukalos and David H Childress explore a Polynesian land of bizarre figures and forbidden places.

40m • 2016

Seven stone giants stand guard over a Pacific island. But what are they protecting – and from whom? Ancient Astronaut theorists Giorgio A Tsoukalos and David H Childress explore a Polynesian land of bizarre figures and forbidden places.

E10 • Russia Declassified

A secret alliance hidden in plain sight. Joint space missions with undisclosed agendas. Have the United States and Russia been working together from the very beginning of the Space Race - in preparation for the ultimate extraterrestrial encounter?

41m • 2016

A secret alliance hidden in plain sight. Joint space missions with undisclosed agendas. Have the United States and Russia been working together from the very beginning of the Space Race - in preparation for the ultimate extraterrestrial encounter?

E11 • They Came From The Sky

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

41m • 2016

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

E12 • Earth Station Egypt

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.

1h 22m • 2016

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.

E13 • The Artificial Human

Are intelligent robots a threat to humanity - or the next step in human evolution? As man and machine begin to merge, are we fulfilling a destiny prepared for us by aliens thousands of years ago?

1h 22m • 2016

Are intelligent robots a threat to humanity - or the next step in human evolution? As man and machine begin to merge, are we fulfilling a destiny prepared for us by aliens thousands of years ago?

E14 • Return To Mars

As humanity prepares to establish colonies beyond Earth, are we simply realising mankind's future or returning to its extraterrestrial past? And when humans become the alien visitors on other planets, what - or who - will we encounter?

1h 22m • 2016

As humanity prepares to establish colonies beyond Earth, are we simply realising mankind's future or returning to its extraterrestrial past? And when humans become the alien visitors on other planets, what - or who - will we encounter?

E15 • The Alien Phenomenon

Erich von Däniken'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?

1h 22m • 2016

Erich von Däniken'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?