Table: episodes_table_42
Columns: no_in_series
no_in_season
title
directed_by
written_by
original_air_date
production_code

Question: Who wrote episode number 81 in the series?
SQL: SELECT "written_by" FROM episodes_table_42 WHERE "no_in_series" = 81

Question: What is the original air date for "ex-wives and videotapes"?
SQL: SELECT "original_air_date" FROM episodes_table_42 WHERE "title" = '"Ex-Wives and Videotapes"'

Question: What is the original air date for "one rat, one ranger"?
SQL: SELECT "original_air_date" FROM episodes_table_42 WHERE "title" = '"One Rat, One Ranger"'

Question: How many episodes directed by david carson?
SQL: SELECT COUNT("no_in_season") FROM episodes_table_42 WHERE "directed_by" = 'David Carson'

Question: Who direcred the episode with production code 7d03?
SQL: SELECT "directed_by" FROM episodes_table_42 WHERE "production_code" = '7D03'