CREATE TABLE table_27033 ("\\u2116" FLOAT, "Title" TEXT, "Directed by" TEXT, "Written by" TEXT, "Original air date" TEXT, "Production code" TEXT, "U.S. viewers  ( million ) " TEXT)

Who wrote the episode with 8.61 million U.S. viewers?
SELECT "Written by" FROM table_27033 WHERE "U.S. viewers (million)" = '8.61'
SELECT "Written by" FROM "table_27033" WHERE "U.S. viewers (million)" = '8.61'