Derek, a brilliant college student haunted by a childhood UFO sighting, believes that the mysterious sightings reported at multiple airports across the United States are UFOs. With the help of his girlfriend, Natalie, and his advanced mathematics professor, Dr. Hendricks, Derek races to unravel the mystery with FBI Special Agent Franklin Ahls on his heels.

The U.S. Navy makes a chilling discovery: an extraterrestrial craft has landed in the Atlantic Ocean. As a result, Deputy National Security Advisor J.T. Baylock must quickly assemble a team of experts to prepare for the possibility of an unprecedented crisis situation--an alien invasion. The response plan activated by the government is dubbed "Threshold"--And the gathered members of the team are experts in their individual pursuits. Dr. Molly Anne...

This season explores new areas of ancient technology, engineering, and communications that engender fresh perspectives about unexplained phenomena throughout time. From meteor impact and over 10,000 crop circles in over 50 countries to complex ancient temples and towering obelisks in Turkey and Egypt to over five decades₂ worth of extensive data collected by MUFON, a vast collection of UFO investigators, Giorgio A. Tsoukalos and other ancient astronaut...

Investigates possibilities of extraterrestrial contact at the dawn of human civilization.

Join Giorgio Tsoukalos and other ancient astronaut theorists as they continue their search for evidence of extraterrestrial contact in the distant past as well as the present. From Tibet, Chile, and the Mediterranean to the iconic UFO site of Roswell to the Pleiades star cluster, this season travels to the far reaches of the globe and beyond to delve into mankind's origins, mysterious government organizations, and the secrets of the universe, all...

In this season, Giorgio A. Tsoukalos and other ancient astronaut theorists revisit the vast locations across the globe where investigators have found the most compelling and promising evidence of extraterrestrial presence on Earth. From deep underground to the infinite skies, including sites and structures rich with otherworldly artifacts and evidence of UFO sightings and unexplained encounters, experts the world over offer definitive proof that we...