CREATE TABLE "table1_28787871_3" (
  "no_in_series" real,
  "no_in_season" real,
  "title" text,
  "original_air_date" text,
  "production_code" real,
  "u_s_viewers_millions" text
);

Question: What was the airdate of the episode of production code 214?
SQL: SELECT "original_air_date" FROM "table1_28787871_3" WHERE "production_code"=214;

Question: How many numbers in the season have an air date of June 3, 2012?
SQL: SELECT COUNT("no_in_season") FROM "table1_28787871_3" WHERE "original_air_date"='June 3, 2012';

Question: What is the highest production code of the episodes having a US viewership of exactly 2.3?
SQL: SELECT MAX("production_code") FROM "table1_28787871_3" WHERE "u_s_viewers_millions"='2.3';

Question: How many millions of US viewers watched the episode titled "Happy Howl-o-ween"?
SQL: SELECT "u_s_viewers_millions" FROM "table1_28787871_3" WHERE "title"='\"Happy Howl-O-Ween\"';