NBC's The Enemy Within begins with a stat: “The FBI estimates there are one hundred thousand foreign spies working within the United States today….More than any other time in history.” Now, I'm no analyst, but I can pretty confidently estimate that it feels like there are roughly the same amount of FBI and/or CIA-themed espionage shows airing on TV right now [dramatic pause] more than any other time in history. The Americans recently come to a close, but there is still Killing Eve, Whiskey Cavalier, Criminal Minds, Tom Clancy's Jack Ryan, Gone, FBI, and …