Following a lead, the team goes to Italy to probe a case where an UFO allegedly shot down a helicopter. While there, high-ranking military officials drop a bombshell. Former Senator Harry Reid goes on the record in wanting to get the truth about UFOs.

The team follows a trail of evidence connecting UFOs to the most destructive weapons in human history. A former U.S Air Force Colonel discloses an encounter on Christmas Eve 1980, while another former Air Force officer describes a UFO-related injury. Was the U.S. military planting UFO misinformation to distract attention from top secret test, or are they hiding an even more ominous threat?

The list of military eyewitnesses describing strange and threatening unidentified craft in U.S airspace is growing. And now, a U.S. Navy radar operator has provided something more: Actual coordinates where UFOS appeared and disappeared. Lue Elizondo and a new partner follow the trail, and find that these unidentified craft are still seen. New eyewitnesses provide chilling details, and a correlation to U.S military sightings. As the reports mount, Lue closes in on a location where visitors are not allowed: Ground zero for the sightings.

Evidence continues to mount and patterns emerge, as a group of former U.S. government insiders seek the truth behind UFOs. A shocking new encounter pulls them to another part of the U.S.A. where two more military eyewitnesses risk their career to recount what they saw, describing a mass sighting of UFOs within striking distance of one of the most important cities in the U.S. video, authenticated for the first time, shows bizarre, unidentified craft with incredible abilities, but what the team learns next is chilling: The objects may follow ships and people.

Former intelligence officer Chris Mellon spearheads an investigation into one of the UFO phenomenon's great mysteries.

In an international UFO hotspot, Lue Elizondo uncovers exclusive video of a glowing orb recorded recently by an airline pilot at 35,000 feet and investigates possible connections to secret technology related to the USSR, plus a shocking aerial battle between a jet fighter pilot and an UFO.

Lue Elizondo calls on a new technology to analyze a series of UFO videos all recorded in 2019–a year that featured a huge increase in UFO sightings. While previously focusing on U.S. Military eyewitnesses, the team broadens its focus to civilian accounts. Among the cases are a series of strange formations of craft reported by civilians in Colorado. Connections to UFO sightings by the U.S. Military are explored.

When Lue Elizondo was part of the Pentagon’s Advanced Aerospace Threat Identification Program (AATIP) he identified five observable characteristics of UFOs, dubbed the “five observables.” But there is a so-called sixth observable Elizondo began to investigate–an invisible threat these craft may pose. On the trail of this phenomenon, he uncovers never-before-told accounts by U.S. Air Force personnel stationed at the USA’s most sensitive sites.