Who is the written by when the title is "his hour upon the stage"?
CREATE TABLE "table1_2618072_1" (
  "no_in_series" real,
  "no_in_season" real,
  "title" text,
  "directed_by" text,
  "written_by" text,
  "original_air_date" text,
  "production_code" real
);
SELECT "written_by" FROM "table1_2618072_1" WHERE "title"='\"His Hour Upon the Stage\"';