As a scientist is recruited by the US Air Force to investigate the claims of UFOs, he begins to witness mysterious phenomena.
When a woman and her children claim that they witnessed the crash of a spaceship, Hynek and Quinn try to determine the validity of that UFO sighting.
When the population of a Texan city claims to have seen a mysterious spacecraft, it's up to Hynek and Quinn to parse the mystery of the mass sighting.
Hynek and Quinn stumble onto a confidential program that employs former Nazi scientists as they try to figure out the mystery behind an incident that involves a UFO and a commercial airliner.
A rare opportunity presents itself when Hynek and Quinn reach a group that claims to have a way to communicate with the aliens they encountered during combat.
A weapons test goes south, causing a near-nuclear disaster after the mysterious appearance of green balls, leaving Hynek and Quinn to try to figure out what happened.
As General Harding recruits Quinn for a mission, Hynek is left to his own devices as he looks into the disappearance of a Scoutmaster.
Hynek and Quinn meet up with the traumatized soldiers of an army platoon that ran amok of a UFO.
Hynek and Quinn's lives hang on the line as the survivor of an alien abduction holds them hostage as he looks for answers for what happened to him.
The arrival of numerous UFOs into Washington throws everyone into panic as Hynek and Quinn try to assess the severity of the threat.