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_11664625_2 (original_air_date VARCHAR, no_in_season VARCHAR)
### Question:
What is the original air date of season 18?
### Answer:
SELECT original_air_date FROM table_11664625_2 WHERE no_in_season = 18