Below is an context that describes a sql query, paired with an question that provides further information. Write an answer that appropriately completes the request.  # noqa: E501
### Context:
CREATE TABLE table_18335117_3 (original_air_date VARCHAR, no_overall VARCHAR)
### Question:
When 15 is the number overall what is the original air date?
### Answer:
SELECT original_air_date FROM table_18335117_3 WHERE no_overall = 15