When did season 9 originally air?
CREATE TABLE table_72728 (
    "Series #" real,
    "Season #" real,
    "Title" text,
    "Directed by:" text,
    "Written by:" text,
    "Original air date" text
)
SELECT "Original air date" FROM table_72728 WHERE "Season #" = '9'
Below are sql tables schemas paired with instruction that describes a task. Using valid SQLite, write a response that appropriately completes the request for the provided tables. ### Instruction: When did season 9 originally air? ### Input: CREATE TABLE table_72728 (
    "Series #" real,
    "Season #" real,
    "Title" text,
    "Directed by:" text,
    "Written by:" text,
    "Original air date" text
) ### Response: SELECT "Original air date" FROM table_72728 WHERE "Season #" = '9'