CREATE TABLE "table1_26845668_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: What is the production code for the movie with 4.32 million U.S. viewers?
SQL: SELECT "production_code" FROM "table1_26845668_1" WHERE "u_s_viewers_millions"='4.32';