I have watched the first series, or should I say season, and in case anybody is wondering if they should commit to it in the hope of any sort of resolution by that stage I would say not to. It is entertaining though with a couple of good twists but I am always put off by the sense that it's just going to be spun out endlessly. Did he do it? Yes he did. No, he didn't. Maybe he did! Oh no, he didn't. etc.
I would recommend Boardwalk Empire though. The first season is great and the second one is really good too. Starting to have soapy moments but not too many.