Who wrote the episode with production code 57376?
CREATE TABLE "table1_29583441_1" (
  "no_in_series" real,
  "title" text,
  "directed_by" text,
  "written_by" text,
  "original_air_date" text,
  "production_code" real
);
SELECT "written_by" FROM "table1_29583441_1" WHERE "production_code"=57376;