CREATE TABLE table_72728 ("Series #" FLOAT, "Season #" FLOAT, "Title" CLOB, "Directed by:" CLOB, "Written by:" CLOB, "Original air date" CLOB)

When did season 9 originally air?
SELECT "Original air date" FROM table_72728 WHERE "Season #" = '9'
SELECT "Original air date" FROM "table_72728" WHERE "Season #" = '9'