[ftcHn]

If you like le Carre, British TV Series "The Sandbaggers" is in a similar vein. I've watched a bunch of episodes on youtube and they are great with a focus on dialog and schemes as opposed to action.

https://www.youtube.com/watch?v=rhRH76fepKg

[euroderf]

Seconded. A series that was low on gloss and high on grunt work and real danger.