Who directed the episode titled "Two Towns"?
CREATE TABLE "table1_228973_11" (
  "no_in_series" real,
  "no_in_season" real,
  "title" text,
  "directed_by" text,
  "written_by" text,
  "original_air_date" text
);
SELECT "directed_by" FROM "table1_228973_11" WHERE "title"='\"Two Towns\"';