Table: episodes_16
Columns: no
col
title
directed_by
written_by
original_air_date
production_code
u_s_viewers_million

Question: When did the title "secret weapons" originally air?
SQL: SELECT "original_air_date" FROM episodes_16 WHERE "title" = '"Secret Weapons"'

Question: How many u.s. viewers (million) have the number 16?
SQL: SELECT "u_s_viewers_million" FROM episodes_16 WHERE "col" = 16

Question: What is the production code of the title "secret weapons"?
SQL: SELECT "production_code" FROM episodes_16 WHERE "title" = '"Secret Weapons"'

Question: How many u.s. viewers  (million) have the production code of 5.09?
SQL: SELECT "u_s_viewers_million" FROM episodes_16 WHERE "production_code" = '5.09'