When the season number is listed as 4 what is the original airdate?
CREATE TABLE table_1339 (
    "Series #" real,
    "Season #" real,
    "Title" text,
    "Directed by:" text,
    "Written by:" text,
    "Original air date" text
)
SELECT "Original air date" FROM table_1339 WHERE "Season #" = '4'
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 the season number is listed as 4 what is the original airdate? ### Input: CREATE TABLE table_1339 (
    "Series #" real,
    "Season #" real,
    "Title" text,
    "Directed by:" text,
    "Written by:" text,
    "Original air date" text
) ### Response: SELECT "Original air date" FROM table_1339 WHERE "Season #" = '4'