Table: episodes_13
Columns: no_overall
no_in_series
title
director
writer
original_air_date
production_code

Question: Name the original air date for barnaby southcomb for charlie martin
SQL: SELECT "original_air_date" FROM episodes_13 WHERE "director" = 'Barnaby Southcomb' AND "writer" = 'Charlie Martin'

Question: Name the number in series for number 38
SQL: SELECT MIN("no_in_series") FROM episodes_13 WHERE "no_overall" = 38