Table: episode_details_2
Columns: no_in_series
title
directed_by
written_by
air_date
production_code

Question: When 1008/1009 is the production code how many directors are there?
SQL: SELECT COUNT("directed_by") FROM episode_details_2 WHERE "production_code" = '1008/1009'

Question: When arthur heinemann is the writer who is the director?
SQL: SELECT "directed_by" FROM episode_details_2 WHERE "written_by" = 'Arthur Heinemann'