After mysterious green fireballs nearly cause nuclear disaster during a weapons test, Hynek and Quinn must investigate how this could have occurred, each with altering theories as to what's really going on. Based on the "Green Fireball" incidents over several military bases. See more in Season 1, Episode 6, "The Green Fireballs." #ProjectBlueBook Subscribe for more from Project Blue Book: http://histv.co/SubscribeHistoryYT Find out more about the series on our site: https://histv.co/PBB Check out exclusive The HISTORY Channel content: History Newsletter - https://histv.co/newsletter Website - https://histv.co/History Facebook - https://histv.co/Facebook Twitter - https://histv.co/Twitter HISTORY’s upcoming new drama series ‘Project Blue Book’ is based on the true, top-secret investigations into Unidentified Flying Objects (UFOs) and related phenomena conducted by the United States Air Force from 1952 to 1969. The HISTORY® Channel, a division of A+E Networks, is the premier destination for historical storytelling. From best-in-class documentary events, to a signature slate of industry leading nonfiction series and premium fact-based scripted programming, The HISTORY® Channel serves as the most trustworthy source of informational entertainment in media. The HISTORY® channel has been named the #1 U.S. TV network in buzz for seven consecutive years by YouGov BrandIndex, and a top favorite TV network by Beta Research Corporation. For a deeper dive, visit history.com or follow @history on Instagram, Twitter, Facebook, YouTube and TikTok. For additional press materials visit the A+E Networks Press Center at http://press.aenetworks.com.