Name the least episode number for  anne brooksbank and vicki madden
CREATE TABLE "table1_25764073_3" (
  "season_num" real,
  "episode_num" real,
  "title" text,
  "director_s" text,
  "writer_s" text,
  "original_air_date" text
);
SELECT MIN("episode_num") FROM "table1_25764073_3" WHERE "writer_s"='Anne Brooksbank and Vicki Madden';