CREATE TABLE table_74202 ("No. in series" TEXT, "No. in season" TEXT, "Title" TEXT, "Directed by" TEXT, "Written by" TEXT, "Original air date" TEXT, "Prod. code" TEXT, "U.S. viewers  ( millions ) " TEXT)

who directed the episode that 6.3 million u.s. viewers saw?
SELECT "Directed by" FROM table_74202 WHERE "U.S. viewers (millions)" = '6.3'
SELECT "Directed by" FROM "table_74202" WHERE "U.S. viewers (millions)" = '6.3'