CREATE TABLE table_1780 ("No. in series" FLOAT, "No. in season" FLOAT, "Title" TEXT, "Directed by" TEXT, "Written by" TEXT, "Original air date" TEXT, "Production code" TEXT, "U.S. viewers  ( million ) " TEXT)

Who was the episode writer when the viewers reached 3.03 million in the US?
SELECT "Written by" FROM table_1780 WHERE "U.S. viewers (million)" = '3.03'
SELECT "Written by" FROM "table_1780" WHERE "U.S. viewers (million)" = '3.03'