What episode had a share percentage of 41.5%?
CREATE TABLE "series_7_2013" (
  "episode" text,
  "date" text,
  "official_itv_rating_millions" text,
  "weekly_rank" real,
  "share_pct" text,
  "official_itv_hd_rating_millions" text,
  "total_itv_viewers_millions" text
);
SELECT "episode" FROM "series_7_2013" WHERE "share_pct"='41.5';