CREATE TABLE table_27246 ("Series #" FLOAT, "Season #" FLOAT, "Title" TEXT, "Directed by" TEXT, "Written by" TEXT, "Original air date" TEXT, "U.S. viewers  ( millions ) " TEXT)

What number in the season was the episode with 12.23 million viewers?
SELECT "Season #" FROM table_27246 WHERE "U.S. viewers (millions)" = '12.23'
SELECT "Season #" FROM "table_27246" WHERE "U.S. viewers (millions)" = '12.23'