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_20592 ( "Season #" real, "Series #" real, "Title" text, "Director(s)" text, "Writer(s)" text, "Original airdate" text )

### Question ###
What is the season number of the episode directed by Donald Crombie and the series number is 40?

### Accurate SQL ###

SELECT "Season #" FROM table_20592 WHERE "Director(s)" = 'Donald Crombie' AND "Series #" = '40'