Started series 4 Saturday, finished it last night. Superb.

Not sure its the best of the 4 series (I probably lean to Series 2 which I watched again before starting 4) but it was top quality stuff yet again. I was wondering where they could go after the ending of 3 but they did well. Dont want to say too much and spoil it for people who might want to get into it from the start.

Considering I dont speak Italian, and have to rely on subtitles, the suspense and drama they build with each episode is gripping.