Table: tv_episode_data_16
Columns: no_in_series
no_in_season
title
directed_by
written_by
original_air_date
production_code
u_s_viewers_millions

Question: What was the series number for the episode "I Forgot to Remember to Forget"?
SQL: SELECT MIN("no_in_series") FROM tv_episode_data_16 WHERE "title" = '"I Forgot to Remember to Forget"'

Question: Who directed the episode that was viewed by 2.57 million people in the U.S.?
SQL: SELECT "directed_by" FROM tv_episode_data_16 WHERE "u_s_viewers_millions" = '2.57'

Question: Who directed the episode that was viewed by 2.50 million people in the U.S.?
SQL: SELECT "directed_by" FROM tv_episode_data_16 WHERE "u_s_viewers_millions" = '2.50'

Question: Which episode number in season 5 was viewed by 3.00 million U.S. viziers?
SQL: SELECT MIN("no_in_season") FROM tv_episode_data_16 WHERE "u_s_viewers_millions" = '3.00'