CREATE TABLE table_27169029_1 (written_by VARCHAR2, original_air_date VARCHAR2)

Who wrote the episode that aired on September 26, 2010?
SELECT written_by FROM table_27169029_1 WHERE original_air_date = "September 26, 2010"
SELECT "written_by" FROM "table_27169029_1" WHERE "September 26, 2010" = "original_air_date"