Project Blue Book is an American historical drama television series that premiered on History on January 8, 2019.[1] The main role of Dr. J. Allen Hynek is played by Aidan Gillen, and the first season consisted of ten episodes.[2][3] The series is based on the real-life Project Blue Book, a series of studies on unidentified flying objects conducted by the United States Air Force. On February 10, 2019, History renewed the series for a 10-episode second season which premiered on January 21, 2020.[4][5] In May 2020, it was announced that the series had been canceled.[6]