Table: tv_episode_data_132
Columns: no_in_series
no_in_season
title
directed_by
written_by
original_air_date
production_code_s
u_s_viewers_millions

Question: who are the directors of the episode that had 20.5 millions of north american viewers? 
SQL: SELECT "directed_by" FROM tv_episode_data_132 WHERE "u_s_viewers_millions" = '20.5'

Question: how many millions of north american viewers had the episode whose director was Michael Lembeck? 
SQL: SELECT "u_s_viewers_millions" FROM tv_episode_data_132 WHERE "directed_by" = 'Michael Lembeck'

Question: who are the writers of the episode whose production code(s) is 225560? 
SQL: SELECT "written_by" FROM tv_episode_data_132 WHERE "production_code_s" = 225560

Question: who are the writers of the episode called "The one on the last night"?
SQL: SELECT "written_by" FROM tv_episode_data_132 WHERE "title" = '"The One on the Last Night"'