The first season averaged only 2.52 million viewers per week in 2011, but by Season 6 in 2016, an average of 7.69 million viewers were tuning in weekly.
That said, it’s worth noting that Game of Thrones’ weekly numbers have significantly increased over the years.
HBO got impressive results for that $100 million investment, but Westworld may need to perform better than 3.3 million if the show is going to justify such a massive budget for any future seasons.