CREATE TABLE table_22570 ("Series episode" FLOAT, "Season episode" FLOAT, "Title" TEXT, "Directed by" TEXT, "Written by" TEXT, "Original air date" TEXT, "Viewers  ( millions ) " TEXT)

What is the show episode number of the episode that reached 1.215 millions views?
SELECT MIN("Series episode") FROM table_22570 WHERE "Viewers (millions)" = '1.215'
SELECT MIN("Series episode") FROM "table_22570" WHERE "Viewers (millions)" = '1.215'