What is the production code for the episode that had 18.07 million viewers? 
CREATE TABLE table_26198709_1 (production_code VARCHAR, us_viewers__million_ VARCHAR)
SELECT production_code FROM table_26198709_1 WHERE us_viewers__million_ = "18.07"
<s>[INST] Write mssql query to answer the following question given the database schema. Schema: CREATE TABLE table_26198709_1 (production_code VARCHAR, us_viewers__million_ VARCHAR) Question: What is the production code for the episode that had 18.07 million viewers?  [/INST] SELECT production_code FROM table_26198709_1 WHERE us_viewers__million_ = "18.07" </s>