CREATE TABLE table_4236 ("Series #" FLOAT, "Season #" FLOAT, "Title" TEXT, "Directed by" TEXT, "Written by" TEXT, "Original air date" TEXT, "Production code" TEXT, "U.S. viewers  ( million ) " TEXT)

Who directed the episode that was watched by 2.67 million U.S. viewers?
SELECT "Directed by" FROM table_4236 WHERE "U.S. viewers (million)" = '2.67'
SELECT "Directed by" FROM "table_4236" WHERE "U.S. viewers (million)" = '2.67'