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_19229713_4 ( production_code VARCHAR, us_viewers__million_ VARCHAR )

### Question ###
Name the production code for viewers for 1.69

### Accurate SQL ###

SELECT production_code FROM table_19229713_4 WHERE us_viewers__million_ = "1.69"