Name the airdate for the episode written by howard ostroff
CREATE TABLE "table1_2342078_6" (
  "episode_num" real,
  "season_num" real,
  "title" text,
  "directed_by" text,
  "written_by" text,
  "original_airdate" text,
  "production_code_num" real
);
SELECT "original_airdate" FROM "table1_2342078_6" WHERE "written_by"='Howard Ostroff';