Alien Files: Unsealed

Examine the possible components of aliens' protective second layer of skin.

Explore the increase in UFO sightings that occurred during the spring of 1952.

An in-depth look at the US government's classified and declassified investigations into UFO sightings.

An investigation into a possible secret space force operated by America.

This episode looks at whether fighter jets provide an adequate defense security against UFOs.

Discover how international governments investigate UFO sightings and the secrecy in which they shroud their findings.

An in-depth look at the information obtained from people who have experienced alien abductions.

Discover theories relating to why aliens are interested in visiting Earth, including the allures of the human mind and human civilisation.

Explore the travel challenges that alien spaceships face, and discover whether humans can tackle interstellar flight.

This episode investigates the claim that there is an alien presence already on Earth.

As the world continues to evolve into the digital age, people are capturing images in the sky that they are unable to explain.

Join us as we investigate the existence of UFOs and determine the possibility that they may be from Earth.

In 1947, there was an unprecedented wave of UFO sightings that propelled the UFO phenomenon to the world stage. What were the US Air Force's findings?

For many people, the most credible UFO reports are those raised by law enforcement. We investigate the most significant reports from police records.

Between 1981 and 2011, cameras on NASA space shuttles have picked up many images of UFOs that experts still struggle to explain.

While many UFO sightings occur in rural locations with only a single eyewitness, there have been sightings over cities witnessed by hundreds.

With science closer than ever to proving that life once lived on Mars, is there a chance that something still exists there?

With light from distant stars taking millions of years to reach us, how long might it take for alien life to answer any communication sent into space?

Is biological life merely a stepping stone for a universe dominated by alien artificial intelligence?

As humanity continues to search for alien life, experts give their analysis on how close we are to first contact.