CREATE TABLE table_15943 ("Season" FLOAT, "Timeslot  (  ET  ) " TEXT, "Season premiere" TEXT, "Season finale" TEXT, "TV season" TEXT, "Rank" TEXT, "Viewers  ( millions ) " TEXT)

What is the year of the season that was 12?
SELECT "TV season" FROM table_15943 WHERE "Season" = '12'
SELECT "TV season" FROM "table_15943" WHERE "Season" = '12'