Table: episodes_12
Columns: episode
season
title
writer_s
director
originalairdate

Question: what episode # was titled "SWAT Kats Unplugged"?
SQL: SELECT "episode" FROM episodes_12 WHERE "title" = '"SWAT Kats Unplugged"'

Question: what was the title of the episode 21a?
SQL: SELECT "title" FROM episodes_12 WHERE "episode" = '21a'

Question: who wrote episode 14?
SQL: SELECT "writer_s" FROM episodes_12 WHERE "episode" = '14'

Question: on what date did the episode titled "A Bright and Shiny Future" originally air?
SQL: SELECT "originalairdate" FROM episodes_12 WHERE "title" = '"A Bright and Shiny Future"'