Couldn't agree more, The Bureau had me hooked from start to finish. After the first episode, I basically binge-watched the entire 5 seasons non-stop. Subtitles are not an issue for me as I always have them on anyway. It takes a couple of episodes to get into it as they don't do out of their way to explain things. It's like you've been dropped into a job with an intelligence service with no training.

"Tehran" (Israeli spy thriller) is another really good spy series. You really get a feel for the oppressive environment in Iran under the thumb of the IRGC.

Also "The Spy" with Sascha Baron Cohen is excellent too.