How many episodes were released on DVD in the US on October 13, 2009?
CREATE TABLE "table1_14855908_3" (
  "dvd_name" text,
  "episodes" real,
  "region_1_can" text,
  "region_1_us" text,
  "region_2_fr" text,
  "region_4" text
);
SELECT "episodes" FROM "table1_14855908_3" WHERE "region_1_us"='October 13, 2009';