What month and year was "storm warning (part one)" filmed?
CREATE TABLE "table1_2370579_1" (
  "episode_num" real,
  "prod_num" real,
  "title" text,
  "directed_by" text,
  "written_by" text,
  "originalairdate" text,
  "filmed" text
);
SELECT "filmed" FROM "table1_2370579_1" WHERE "title"='\"Storm Warning (part one)\"';