CREATE TABLE table_29920800_1 (directed_by VARCHAR, us_viewers__million_ VARCHAR)

Who directed the episode that was watched by 2.97 million U.S. viewers?
SELECT directed_by FROM table_29920800_1 WHERE us_viewers__million_ = "2.97"
SELECT "directed_by" FROM "table_29920800_1" WHERE "2.97" = "us_viewers__million_"