CREATE TABLE table_19401346_1 (title VARCHAR, original_air_date VARCHAR)

What's the title of the episode originally aired on September 23, 2008?
SELECT title FROM table_19401346_1 WHERE original_air_date = "September 23, 2008"
SELECT "title" FROM "table_19401346_1" WHERE "September 23, 2008" = "original_air_date"