CREATE TABLE table_234 ("Season" FLOAT, "Season premiere" TEXT, "Season finale" TEXT, "TV season" TEXT, "Ranking" TEXT, "Viewers  ( in millions ) " TEXT)

When did the season air where the viewership was 14.71 million?
SELECT "Season premiere" FROM table_234 WHERE "Viewers (in millions)" = '14.71'
SELECT "Season premiere" FROM "table_234" WHERE "Viewers (in millions)" = '14.71'