Table: episodes_table_4
Columns: no_in_season
no_in_series
title
canadian_airdate
us_airdate
production_code

Question: What is the latest season number for a show with a production code of 816?
SQL: SELECT MAX("no_in_season") FROM episodes_table_4 WHERE "production_code" = 816

Question: How many U.S. air dates were from an episode in Season 4?
SQL: SELECT COUNT("us_airdate") FROM episodes_table_4 WHERE "no_in_season" = 4