Close Encounters explores the countless UFO sightings reported from regions around the globe. Most sightings can be accounted for by weather patterns, flight schedules or extraordinary imagination. But a select few are still considered unsolved extraterrestrial puzzles.

In this first-of-its-kind global series, an international task force led by the United States will use every sighting, declassified file, and every piece of evidence since the dawn of man from 24 different countries to answer one question: have extraterrestrials made contact?

Explore the most startling disappearances of the modern era, looking at what we know happened that fateful day, what the theories behind their vanishing are – and what science can tell us about what really happened.

Scientist Rob Nelson investigates the strangest underground locations in the world, using the latest technology and research to shed new light on the secrets that lie just beneath our feet.

Strange Evidence investigates mysteries caught on tape and uncovers the science behind some of the most bizarre occurrences ever recorded.

The Unexplained Files investigates bizarre occurrences that have confounded scientists and inspired legends. Join renowned scientists, credible experts and eyewitnesses as they present riveting never-before-seen footage and share their accounts of truly bewildering experiences.

What will first contact look like? The question has perplexed scientists and sci-fi writers for more than a century. Alien Encounters lays out a plausible hypothetical scenario for a first contact event.

Every year, the government funds clandestine programs collectively called the black budget. But what’s exactly behind these secretive missions operating around the globe? Former CIA operative Mike Baker will dig into these mysterious programs each week in Black Files Declassified.