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_2400842_1 ( directed_by VARCHAR, prod__number VARCHAR )

### Question ###
Who directed the epsiode with production number 109?

### Accurate SQL ###

SELECT directed_by FROM table_2400842_1 WHERE prod__number = 109