There’s no slowing down HBO’s “Game of Thrones,” which set another viewership record on Sunday and helped the shows behind it — including newcomer “Last Week Tonight With John Oliver” — to improved numbers.

According to Nielsen estimates, “Game of Thrones” averaged 7.155 million viewers for its regular-timeslot premiere on Sunday, and 8.6 million viewers for the night. Season-to-date, the average gross audience per episode of “Thrones” is 17.8 million viewers, an improvement of 24% vs. this point of last season (14.4 million).

“Thrones” has seen its audience grow sharply with each season, starting in 2011 when its regular-timeslot episodes averaged 2.5 million viewers. It averaged 3.8 million in 2012, and then 5 million last year.

Also for HBO on Sunday, “Silicon Valley” (1.816 million) had its most-watched episode since its premiere, and “Veep” tallied a season-high 1.02 million.

The second episode of “Last Week Tonight With John Oliver” grew about 8% from its premiere for a total of 1.2 million viewers at 11 p.m. and 1.5 million viewers for the night.