Table: tv_episodes_13
Columns: episode
title
directed_by
written_by
originalairdate
ratings

Question: Name the number of ratings for "forests of prejudice"
SQL: SELECT COUNT("ratings") FROM tv_episodes_13 WHERE "title" = '"Forests of Prejudice"'

Question: Name the air date for ratings of 2.19 million
SQL: SELECT "originalairdate" FROM tv_episodes_13 WHERE "ratings" = '2.19 Million'

Question: Name who directed the air date of 12 july 2010
SQL: SELECT "directed_by" FROM tv_episodes_13 WHERE "originalairdate" = '12 July 2010'

Question: Name the least episode number for jonathan harvey
SQL: SELECT MIN("episode") FROM tv_episodes_13 WHERE "written_by" = 'Jonathan Harvey'

Question: Name the total number of written by for 26 july 2010
SQL: SELECT COUNT("written_by") FROM tv_episodes_13 WHERE "originalairdate" = '26 July 2010'