What episode premier received 0.680 million viewers?
CREATE TABLE table_23392257_4 (original_airdate VARCHAR, viewers__millions_ VARCHAR)
SELECT original_airdate FROM table_23392257_4 WHERE viewers__millions_ = "0.680"
<s>[INST] Write mssql query to answer the following question given the database schema. Schema: CREATE TABLE table_23392257_4 (original_airdate VARCHAR, viewers__millions_ VARCHAR) Question: What episode premier received 0.680 million viewers? [/INST] SELECT original_airdate FROM table_23392257_4 WHERE viewers__millions_ = "0.680" </s>