The episode titled "Epiphany" received what scripted show ranking?
CREATE TABLE "new_zealand_tv2" (
  "episode_number" real,
  "title" text,
  "original_airing" text,
  "timeslot" text,
  "viewers" real,
  "top_50_ranking" real,
  "scripted_show_ranking" real
);
SELECT MIN("scripted_show_ranking") FROM "new_zealand_tv2" WHERE "title"='Epiphany';