What was the title of the episode directed by Rowan Woods?
CREATE TABLE "table1_23918997_1" (
  "no" real,
  "title" text,
  "directed_by" text,
  "written_by" text,
  "original_air_date" text,
  "production_code" text,
  "u_s_viewers_million" text
);
SELECT "title" FROM "table1_23918997_1" WHERE "directed_by"='Rowan Woods';