Name the broadcast date of 6.9 million viewers
CREATE TABLE "table1_2114308_1" (
  "episode" text,
  "broadcast_date" text,
  "run_time" text,
  "viewers_in_millions" text,
  "archive" text
);
SELECT "broadcast_date" FROM "table1_2114308_1" WHERE "viewers_in_millions"='6.9';