What is the original air date of the episode that was written by Rama Stagner? 
CREATE TABLE "table1_27389024_2" (
  "no_in_series" real,
  "title" text,
  "directed_by" text,
  "written_by" text,
  "original_air_date" text,
  "u_s_viewers_millions" text
);
SELECT "original_air_date" FROM "table1_27389024_2" WHERE "written_by"='Rama Stagner';