Question: In between the episode 5 and10 of season 2, how many of them are credited for casting?
SQL: SELECT COUNT(credited) FROM Credit WHERE episode_id IN ( 'S20-E5',  'S20-E6',  'S20-E7',  'S20-E8',  'S20-E9',  'S20-E10' ) AND credited = 'true' AND role = 'casting';