What's the season number of the episode originally seen by 6.64 million people in the US?
CREATE TABLE table_23242950_1 (no_in_season INTEGER, us_viewers__millions_ VARCHAR)
SELECT MIN(no_in_season) FROM table_23242950_1 WHERE us_viewers__millions_ = "6.64"
<s>[INST] Write mssql query to answer the following question given the database schema. Schema: CREATE TABLE table_23242950_1 (no_in_season INTEGER, us_viewers__millions_ VARCHAR) Question: What's the season number of the episode originally seen by 6.64 million people in the US? [/INST] SELECT MIN(no_in_season) FROM table_23242950_1 WHERE us_viewers__millions_ = "6.64" </s>