CREATE TABLE table_14929574_3 (series__number INT, us_viewers__million_ VARCHAR)

Which episode number drew in 3.84 million viewers in the U.S.?
SELECT MAX(series__number) FROM table_14929574_3 WHERE us_viewers__million_ = "3.84"
SELECT MAX("series__number") FROM "table_14929574_3" WHERE "3.84" = "us_viewers__million_"