CREATE TABLE table_19925114_1 (us_viewers__millions_ VARCHAR, no_in_season VARCHAR)

How many different numbers of people in the US who'd seen the episode with a season number 8 are there?
SELECT COUNT(us_viewers__millions_) FROM table_19925114_1 WHERE no_in_season = 8
SELECT COUNT("us_viewers__millions_") FROM "table_19925114_1" WHERE "no_in_season" = 8