Unsealed: Alien Files (2012) Season 4

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4x01 Second Skin aired Apr 24, 2015

Many experts believe aliens have visited the Earth for thousands of years, but if we can't survive space travel without a protective suit, how can they? Are ... read more

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4x02 The 1952 Wave aired Apr 24, 2015

In the spring of 1952, UFO sightings go off the charts. For years, the U.S. government has told the postwar public that UFOs do not exist, but behind the sce... read more

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4x03 The Freedom of Information Act aired May 01, 2015

In 1969, the U.S. government officially announces it will stop investigating UFOs, but declassified documents reveal that multiple government agencies have b... read more

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4x04 The Space Force aired May 01, 2015

Since the early 1960s, we've experimented with how to travel off planet Earth. Many experts believe America has operated a secret Space Force for decades, wi... read more

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4x05 The Shoot Down Order aired May 08, 2015

Since the Jet Age, fighter pilots have been scrambled to intercept UFOs in our skies, but what happens when pilots are sent a Shoot Down Order and can't comp... read more

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4x06 Seeing Is Believing aired May 08, 2015

For decades, governments around the world have investigated UFO sightings, often times under an umbrella of secrecy. How are these top-secret studies conduct... read more

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4x07 Inside UFOs aired May 15, 2015

Alien abductions are the only types of encounters in which eyewitness testimony can reveal details about the inside of UFOs. Details that can help us underst... read more

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4x08 Unwelcome Visitors aired May 22, 2015

If aliens have visited Earth, why are they here and what are they truly after? Investigations have revealed the possibility that aliens are interested in exp... read more

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4x09 Alien Journeys aired May 29, 2015

In order to survive mankind must find a way to navigate the galaxy. Alien encounters have offered a possible glimpse into the secrets of interstellar flight,... read more

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4x10 Finding Aliens aired Jun 05, 2015

Rapid advancements in science and technology have given mankind unprecedented access to distant galaxies that could harbor life. And some scientists believe ... read more

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4x11 UFO Photos aired Aug 01, 2015

Photographic evidence of Unidentified Flying Objects helped usher in the modern UFO phenomenon. As the world continues to evolve into the digital age, more a... read more

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4x12 UFOs From Earth aired Aug 01, 2015

Where do UFOs come from? Some people believe they're from distant galaxies, wormholes, or other planets within the Milky Way. Join us as we investigate the e... read more

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4x13 Summer of Saucers aired Aug 01, 2015

In 1947, a series of UFO sightings triggers an unprecedented analysis that propels the UFO phenomenon on to the world stage. We investigate how the U.S. Air ... read more

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4x14 Police Sightings aired Aug 01, 2015

UFO sightings happen almost every day. But in the court of public opinion the most credible witnesses come from law enforcement. Join us as we investigate th... read more

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4x15 Space Shuttle Encounters aired Aug 01, 2015

Between 1981 and 2011, NASA's Space Shuttles flew 135 missions. The Space Shuttle cameras, manned and unmanned, have recorded astounding footage of UFOs that... read more

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4x16 Mass Sightings aired Sep 01, 2015

Many famous UFO sightings occur in remote locations with just a single eyewitness. But some sightings have taken place over large cities with hundreds of wit... read more

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4x17 Mars, the Final Frontier aired Sep 01, 2015

Scientists have never been closer to proving that life once lived on Mars. But is it still there? And if so, how has it evolved? Join us as we investigate th... read more

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4x18 Alien Communications aired Dec 01, 2015

Scientists and Ufologists are scouring the vast regions of space for signs of extraterrestrial life. But if it takes millions of years for light from distant... read more

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4x19 Artificial Alien Intelligence aired Sep 01, 2015

Some scientists believe the survival of mankind hinges upon the revolutionary science of Artificial Intelligence. Biological life may just be an evolutionary... read more

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4x20 First Contact aired Dec 01, 2015

For decades, scientists have been searching for proof that extraterrestrials exist. But just where does alien life exist? And what does it look like? Join us... read more

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