Season 4 is OUTSTANDING so far. This series gets better every year.

That it does , it one of the only shows I watch start o finish .

I thoroughly enjoyed series four! Much because of Thandie Newton who I thought was brilliant. I heard them disclose that there will be a series five too which made me very happy. There's no reason why this won't be a long-runner, it's such a quality show in every way.

2 more seasons announced , but only 2018 , 2019