Which episode number aired on 18 october 2012?
CREATE TABLE table_25721_3 (episode_no INTEGER, airdate VARCHAR)
SELECT MIN(episode_no) FROM table_25721_3 WHERE airdate = "18 October 2012"
<s>[INST] Write mssql query to answer the following question given the database schema. Schema: CREATE TABLE table_25721_3 (episode_no INTEGER, airdate VARCHAR) Question: Which episode number aired on 18 october 2012? [/INST] SELECT MIN(episode_no) FROM table_25721_3 WHERE airdate = "18 October 2012" </s>