CREATE TABLE table_45535 ("Season" FLOAT, "Premiere" TEXT, "Finale" TEXT, "Rank" TEXT, "Rating" TEXT)

What is the rank for the episode that premiered on September 12, 1979?
SELECT "Rank" FROM table_45535 WHERE "Premiere" = 'september 12, 1979'
SELECT "Rank" FROM "table_45535" WHERE "Premiere" = 'september 12, 1979'