The National Security Agency’s new podcast takes its name from the clandestine organization’s own nickname, No Such Agency, and its hosts—Cam Potts, Christy Wicks, Brian Fassler, and John Parker—are all N.S.A. employees. They were the winners of a talent search that was, given the nature of spycraft, held in-house, the house being a giant campus in Fort Meade, Maryland, where the specifics of what the employees do for the Defense Department is, to put it mildly, secret. The podcast, which is only seven episodes old, is the opposite of some of America’s top podcasts: in contrast to “Call Her Daddy” or “The Joe Rogan Experience,” where guests share details about their sex lives or shards of climate denialism, respectively, “No Such Podcast” feels scripted, with four people in a secure…