Well, yes, it is hard to miss things when it's all pointed out to you ;-) And I do get a better appreciation of the most subtle points thanks to this comm.

I think that I didn't understand you at first because those subtle points are more related to the drama of the show, not really to the 'spy story' aspects (which do appeal to me more). To take the 'bug' example above, that's what spying is all about.