Who directed the title "the razor's edge"?
CREATE TABLE "table1_2226817_3" (
  "no_in_series" real,
  "no_in_season" real,
  "title" text,
  "directed_by" text,
  "written_by" text,
  "original_air_date" text,
  "production_code" text
);
SELECT "directed_by" FROM "table1_2226817_3" WHERE "title"='\"The Razor''s Edge\"';