We saw that Game of Thrones season 5 finale had broken all the piracy records and now we have come to know that it has also become the most watched Game of Thrones episode of all time! It seems as if the pirated downloads didn't have a huge effect on the show ratings. This shows how popular the show has become now. Mother's Mercy has become the most watched Game of Thrones episode with 8.1 million viewers watching the episode. This is what TV Line had to say about the finale:

Sunday’s finale — which featured the degradation of Cersei and the death of you-know-who — attracted a series-high 8.1 million viewers, according to TVBytheNumbers. That trumps the Season 5 premiere’s then-record breaking 8 million viewers. It’s also up 1 million viewers versus the Season 4 finale (7.1 million).