CREATE TABLE table_74307 ("#" FLOAT, "Episode" TEXT, "Directed by" TEXT, "Written by" TEXT, "U.S. Viewers  ( in millions ) " TEXT, "Original airdate" TEXT)

Who wrote the episode with 9.81 million US viewers?
SELECT "Written by" FROM table_74307 WHERE "U.S. Viewers (in millions)" = '9.81'
SELECT "Written by" FROM "table_74307" WHERE "U.S. Viewers (in millions)" = '9.81'