Mass UFO sightings from the last 50 years fuel a global mystery in this docuseries featuring eyewitness accounts, expert interviews and new evidence.

Strange lights in the sky over small-town Texas; submersible space crafts haunting a coastal Welsh village; an alien encounter with schoolchildren in Zimbabwe and non-human intelligence reportedly interfering with a nuclear power plant in Japan.

Told from the perspective of firsthand experiencers in the places where the sightings occurred and guided by scientists and military personnel, the series highlights the profoundly human impact of these encounters on lives, families, and communities. It comes as explosive new revelations emerge from military whistleblowers of alien encounters, UFOs, and clandestine Pentagon programs, as well as coverage from major news sources, which have breathed a fresh urgency into a topic that, for decades, has been relegated to the realm of conspiracy.