CREATE TABLE table_22997 ("No. in series" FLOAT, "No. in season" FLOAT, "Title" TEXT, "Directed by" TEXT, "Written by" TEXT, "Original air date" TEXT, "U.S. viewers  ( millions ) " TEXT)

who directed the episode that have 14.59 million viewers
SELECT "Directed by" FROM table_22997 WHERE "U.S. viewers (millions)" = '14.59'
SELECT "Directed by" FROM "table_22997" WHERE "U.S. viewers (millions)" = '14.59'