Table: episodes_db_3
Columns: no_in_series
no_in_season
title
directed_by
written_by
original_air_date
production_code

Question: Name the number of number in series for production code of 06-04-621
SQL: SELECT COUNT("no_in_series") FROM episodes_db_3 WHERE "production_code" = '06-04-621'

Question: Name the total number of written by for original air date for may 8, 2005
SQL: SELECT COUNT("written_by") FROM episodes_db_3 WHERE "original_air_date" = 'May 8, 2005'