CREATE TABLE table_2655016_9 (series__number VARCHAR, original_air_date VARCHAR)

What is the series # on airdate September 21, 2002?
SELECT series__number FROM table_2655016_9 WHERE original_air_date = "September 21, 2002"
SELECT "series__number" FROM "table_2655016_9" WHERE "September 21, 2002" = "original_air_date"