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_22423 ( "No. in series" text, "Title" text, "Directed By" text, "Written By" text, "air date" text, "Production code" text )

### Question ###
When 1008/1009 is the production code how many directors are there?

### Accurate SQL ###

SELECT COUNT("Directed By") FROM table_22423 WHERE "Production code" = '1008/1009'