This is one of those series, you think you know and when you get to the end you realize, you missed something important.
This is a series which has many layers, in most cases something is missed and you feel you need to watch it again see how it was missed.
This is not a James Bond style series. It is centred around the head of the special ops of the British secret service. On the surface it appears to be about the politics of running a department. Even though it was filmed in the 70's, it holds up well. This is not to say it does not show. This could be a distraction for anybody wanting the slick production of present day.
It is well written, the acting does not get in the way of the stories, the characters are believable.
I watched the series again recently and it left me wanting more TV of this quality. I highly recommend this series.
