CREATE TABLE table_24910733_1 (directed_by VARCHAR2, us_viewers__millions_ VARCHAR2)

Who is the director when there is 11.21 million viewers?
SELECT directed_by FROM table_24910733_1 WHERE us_viewers__millions_ = "11.21"
SELECT "directed_by" FROM "table_24910733_1" WHERE "11.21" = "us_viewers__millions_"