CREATE TABLE "table1_18274425_1" (
  "no_in_series" real,
  "no_in_season" real,
  "title" text,
  "directed_by" text,
  "written_by" text,
  "original_air_date" text,
  "production_code" text,
  "u_s_viewers_millions" text
);

Question: Who were the authors  of episode having production code 3t7573?
SQL: SELECT "written_by" FROM "table1_18274425_1" WHERE "production_code"='3T7573';

Question: How many episodes had a viewership of 2.65 million?
SQL: SELECT COUNT("no_in_season") FROM "table1_18274425_1" WHERE "u_s_viewers_millions"='2.65';

Question: Who were the director/s of episodes written by Mike Daniels?
SQL: SELECT "directed_by" FROM "table1_18274425_1" WHERE "written_by"='Mike Daniels';