CREATE TABLE "table1_20124413_3" (
  "num" text,
  "original_title" text,
  "directed_by" text,
  "written_by" text,
  "original_airdate" text,
  "production_code" text
);

Question: What was the original title of 3.19?
SQL: SELECT "original_title" FROM "table1_20124413_3" WHERE "production_code"='3.19';

Question: What was the production code for "down to earth"?
SQL: SELECT "production_code" FROM "table1_20124413_3" WHERE "original_title"='\"Down to Earth\"';