Publisher Blurb: It's March 1954. The Investigators are sailors and scientists deployed aboard the USS Bairoko to the South Pacific as part of Joint Task Force One to participate in a series of secret thermonuclear test shots in the Bikini atoll called Operation Castle. After the first detonation, the PCs will have more than just radiation to fear... Castle Bravo is a stand-alone Purist Trail of Cthulhu adventure set in the Atomic Age.