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_24399615_5 (airdate VARCHAR, episode_no VARCHAR)

### Question ###
When did episode number 6 air?

### Accurate SQL ###

SELECT airdate FROM table_24399615_5 WHERE episode_no = 6