CREATE TABLE table_42741 ("Season" CLOB, "Ep #" FLOAT, "Season Premiere" CLOB, "Season Finale" CLOB, "Ranking" CLOB, "Viewers  ( Households in millions ) " CLOB, "Rating" CLOB)

What was the rating of the season that had 18.17 million household viewers?
SELECT "Rating" FROM table_42741 WHERE "Viewers (Households in millions)" = '18.17'
SELECT "Rating" FROM "table_42741" WHERE "Viewers (Households in millions)" = '18.17'