Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE table_17901155_4 (original_us_air_date VARCHAR, viewers__millions_ VARCHAR)

### Question ###
Which US air date had 4.4 million viewers?

### Accurate SQL ###

SELECT original_us_air_date FROM table_17901155_4 WHERE viewers__millions_ = "4.4"