CREATE TABLE table_23399481_2 (directed_by VARCHAR2, us_viewers__in_millions_ VARCHAR2)

What is the director name is the U.S. viewers is 2.22 million?
SELECT directed_by FROM table_23399481_2 WHERE us_viewers__in_millions_ = "2.22"
SELECT "directed_by" FROM "table_23399481_2" WHERE "2.22" = "us_viewers__in_millions_"