Who directed the episode called "Tell-tale Heart"?
CREATE TABLE "table1_11075747_4" (
  "series_num" real,
  "episode_num" real,
  "title" text,
  "directed_by" text,
  "written_by" text,
  "original_air_date" text
);
SELECT "directed_by" FROM "table1_11075747_4" WHERE "title"='\"Tell-Tale Heart\"';