CREATE TABLE table_31391 ("Season" CLOB, "Season premiere" CLOB, "Season finale" CLOB, "TV season" CLOB, "Ranking" CLOB, "Viewers  ( in millions ) " CLOB)

What was the 2nd's season's ranking?
SELECT "Ranking" FROM table_31391 WHERE "Season" = '2nd'
SELECT "Ranking" FROM "table_31391" WHERE "Season" = '2nd'