I don't think I can come up with enough words to fully express how important it is for voters to know about the investigations documented in this series. It does a fairly good job of demonstrating how important espionage and counter espionage work is for a nations security. As well as the legislation that enables investigations to succeed. Hearing about these cases on the news, doesn't provide the depth needed to really understand the threats that exist to the US, and the work being done to stop them. This show does a better job of doing that.
It's also interesting to me how well this show manages to be as neutral as possible. If you're like me, and often feel that CNN News has too much of a left-wing bias, then you'll be surprised by the lack of that bias in this particular TV series.
If you were a fan of shows like The FBI Files and Forensic Files, and were looking for a similar style of show to fill the void, this will likely provide your fix. The focus of the show is usually on the investigation itself. However, some episodes spend a lot of time talking about the context of why a certain suspect is important. Sometimes, the amount of time spend on context feels a bit excessive. Other times, not enough.
My only real complain about the show, is the repetition after the end of advertising segments. It gets on my nerves after awhile.