CREATE TABLE "table1_25246990_5" (
  "no_in_series" real,
  "no_in_season" real,
  "title" text,
  "directed_by" text,
  "written_by" text,
  "u_s_viewers_millions" text,
  "original_u_s_air_date" text,
  "prod_code" real
);

Question: What was the original U.S. air date of the episode directed by Julian Petrillo?
SQL: SELECT "original_u_s_air_date" FROM "table1_25246990_5" WHERE "directed_by"='Julian Petrillo';

Question: How many different original U.S. air dates appear where the U.S. viewers were 2.5 million?
SQL: SELECT COUNT("original_u_s_air_date") FROM "table1_25246990_5" WHERE "u_s_viewers_millions"='2.5';

Question: How many U.S. viewers were there for the episode written by Lazar Saric & Jed Spingarn?
SQL: SELECT "u_s_viewers_millions" FROM "table1_25246990_5" WHERE "written_by"='Lazar Saric & Jed Spingarn';

Question: How many U.S. viewers were there for the number 4 episode in season?
SQL: SELECT "u_s_viewers_millions" FROM "table1_25246990_5" WHERE "no_in_season"=4;