CREATE TABLE table_27987623_1 (series_episode INT, us_viewers__in_million_ VARCHAR)

What was the episode number veiwed by 7.43 million viewers?
SELECT MAX(series_episode) FROM table_27987623_1 WHERE us_viewers__in_million_ = "7.43"
SELECT MAX("series_episode") FROM "table_27987623_1" WHERE "7.43" = "us_viewers__in_million_"