Where can I find it in U.S.

No idea, I just download from rarbg.

Season 2 is out now.

tip: it costs about $20 per quarter of the year to get a VPN and you can watch British programs at the same time they are televised in the Uk.

I just finished both seasons on Sundance Now which I get bundled with AMCPlus streaming. The app for AMC stinks but it's got some really great stuff - this series being one of them.