Astrophysicist Dr. Allen Hynek is recruited by the U.S. Air Force into a top-secret program investigating UFOs; Dr. Hynek joins Capt. Michael Quinn to investigate the case of a military pilot who survived a dogfight with an alien craft.
Dr. Hynek and Captain Quinn investigate a West Virginia case of a woman and her two children who witnessed a flying saucer crash near their farm and an alien being emerge from the fiery wreck; based on the Flatwoods Monster case.
Hynek and Quinn are brought in to investigate when the citizens of Lubbock, Texas, witness a mysterious V-shaped craft in the night sky.
A commercial airliner's bizarre UFO encounter leads Hynek and Quinn to a top-secret program involving ex-Nazi scientists in Huntsville, Ala., that has a mysterious agenda all its own.
Hynek and Quinn follow a series of strange clues leading them to a secret group of people who not only claim to have witnessed strange lights during combat called Foo Fighters, but also claim to know a way to contact them.
After mysterious green fireballs nearly cause a nuclear disaster during a weapons test, Hynek and Quinn must investigate how this could have occurred, each with altering theories as to what is really going on.
After a Scoutmaster vanishes when he and his troop witness a strange craft hovering in the woods, Hynek is sent to investigate; Quinn is pulled into a rogue mission for Gen. Harding.
Hynek and Quinn investigate when a film of an Army platoon under UFO attack emerges, and find the soldiers suffering from both physical and psychological effects of war.
A man claiming he was abducted by aliens arrives at Blue Book headquarters with his wife, and plans to hold Hynek and Quinn hostage until they find out the truth.