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_16581695_4 (production_code VARCHAR, no_in_season VARCHAR)

### Question ###
What is the production code for episode 15 in season 3?

### Accurate SQL ###

SELECT production_code FROM table_16581695_4 WHERE no_in_season = "15"