What was the original air date of the episode that had 5.30 million U.S. viewers? 
CREATE TABLE table_25548505_1 (original_air_date VARCHAR, us_viewers__millions_ VARCHAR)
SELECT original_air_date FROM table_25548505_1 WHERE us_viewers__millions_ = "5.30"
<s>[INST] Write mssql query to answer the following question given the database schema. Schema: CREATE TABLE table_25548505_1 (original_air_date VARCHAR, us_viewers__millions_ VARCHAR) Question: What was the original air date of the episode that had 5.30 million U.S. viewers?  [/INST] SELECT original_air_date FROM table_25548505_1 WHERE us_viewers__millions_ = "5.30" </s>