"Blue Book" revolves around American astronomer, professor, and ufologist Josef Allen Hynek (Aidan Gillen), who conducted secret investigations into UFO encounters during the 1950s and 1960s. It recounts the most comprehensive investigations he undertook under the sponsorship of the U.S. Air Force. The series is based entirely on real events and files, focusing on some of the most mysterious UFO incidents in American history.
