CREATE TABLE table_47551 ("Episode" FLOAT, "Original airdate" TEXT, "Timeslot  ( approx. ) " TEXT, "Viewers  ( millions ) " FLOAT, "Nightly rank" TEXT)

What is the lowest episode number with an original airdate on 8 June 2008?
SELECT MIN("Episode") FROM table_47551 WHERE "Original airdate" = '8 june 2008'
SELECT MIN("Episode") FROM "table_47551" WHERE "Original airdate" = '8 june 2008'