On which date did episode # 18 air in the U.S.?
CREATE TABLE table_26464364_1 (us_air_date VARCHAR, _number VARCHAR)
SELECT us_air_date FROM table_26464364_1 WHERE _number = 18
<s>[INST] Write mssql query to answer the following question given the database schema. Schema: CREATE TABLE table_26464364_1 (us_air_date VARCHAR, _number VARCHAR) Question: On which date did episode # 18 air in the U.S.? [/INST] SELECT us_air_date FROM table_26464364_1 WHERE _number = 18 </s>