CREATE TABLE "table1_18712423_3" (
  "series_episode" real,
  "season_episode" real,
  "title" text,
  "directed_by" text,
  "written_by" text,
  "original_air_date" text,
  "viewers_millions" text
);

Question: What is the original air date of the episode directed by Ian Barry and written by Philip Dalkin?
SQL: SELECT "original_air_date" FROM "table1_18712423_3" WHERE "directed_by"='Ian Barry' AND "written_by"='Philip Dalkin';

Question: What is the show episode number of the episode that reached 1.215 millions views?
SQL: SELECT MIN("series_episode") FROM "table1_18712423_3" WHERE "viewers_millions"='1.215';

Question: Who directed the episode written by Matt Ford?
SQL: SELECT "directed_by" FROM "table1_18712423_3" WHERE "written_by"='Matt Ford';