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_13336122_7 (original_air_date VARCHAR, us_viewers__million_ VARCHAR)

### Question ###
How many episodes were seen by 0.67 million US viewers on their original air dates?

### Accurate SQL ###

SELECT COUNT(original_air_date) FROM table_13336122_7 WHERE us_viewers__million_ = "0.67"