Who directed the TV broadcast s03e19?
CREATE TABLE "table1_15861776_1" (
  "no_in_series" real,
  "no_in_season" real,
  "title" text,
  "directed_by" text,
  "written_by" text,
  "originalairdate" text,
  "tv_broadcast" text
);
SELECT "directed_by" FROM "table1_15861776_1" WHERE "tv_broadcast"='S03E19';