CREATE TABLE table_76530 ("Show" CLOB, "Last Aired" FLOAT, "Previous Network" CLOB, "Retitled as/Same" CLOB, "New/Returning/Same Network" CLOB, "Returning" CLOB)

What was the earliest aired show that's returning on September 13?
SELECT MIN("Last Aired") FROM table_76530 WHERE "Returning" = 'september 13'
SELECT MIN("Last Aired") FROM "table_76530" WHERE "Returning" = 'september 13'