Project Blue Book

Dr. J. Allen Hynek worked on three different US Air Force projects related to UFOs: Project Sign, Project Grudge, and Project Blue Book. He formulated the classification system for reporting UFO and alien sightings which he dubbed "Close Encounters". The title of Steven Spielberg's film Close Encounters of the Third Kind (1977) comes from Hynek's work, and in addition to serving as a technical adviser on that film, Hynek appears as one of the scientists at the film's climax.

This series is inspired by Dr. J. Allen Hynek's investigations for the U.S. Air Force into the existence of UFOs. The cases depicted are based on real events.

Referenced in A One-Time Special (2020)