CREATE TABLE table_28037619_2 (written_by VARCHAR2, us_viewers__million_ VARCHAR2)

Who wrote the episode that had 6.05 million U.s. viewers?
SELECT written_by FROM table_28037619_2 WHERE us_viewers__million_ = "6.05"
SELECT "written_by" FROM "table_28037619_2" WHERE "6.05" = "us_viewers__million_"