CREATE TABLE table_3674 ("No." FLOAT, "#" FLOAT, "Title" TEXT, "Directed by" TEXT, "Story by" TEXT, "Teleplay by" TEXT, "Original air date" TEXT, "U.S. viewers  ( millions ) " TEXT)

Who directed the episode that had 0.57 million U.S. viewers?
SELECT "Directed by" FROM table_3674 WHERE "U.S. viewers (millions)" = '0.57'
SELECT "Directed by" FROM "table_3674" WHERE "U.S. viewers (millions)" = '0.57'