Table: episodes_10
Columns: season
series
title
director_s
writer_s
original_airdate

Question: What is the total number of episodes where alexa wyatt is the writer?
SQL: SELECT COUNT("series") FROM episodes_10 WHERE "writer_s" = 'Alexa Wyatt'

Question: Who is the director when Chris Hawkshaw is the writer?
SQL: SELECT "director_s" FROM episodes_10 WHERE "writer_s" = 'Chris Hawkshaw'

Question: What is the season number of the episode directed by Donald Crombie and the series number is 40?
SQL: SELECT "season" FROM episodes_10 WHERE "director_s" = 'Donald Crombie' AND "series" = 40