CREATE TABLE "table1_2112766_1" (
  "episode" text,
  "broadcast_date" text,
  "run_time" text,
  "viewers_in_millions" text,
  "archive" text
);

Question: how many archive were when run time is 24:34
SQL: SELECT "archive" FROM "table1_2112766_1" WHERE "run_time"='24:34';

Question: what is all the  broadcast date when viewers were 8.4 millions
SQL: SELECT COUNT("broadcast_date") FROM "table1_2112766_1" WHERE "viewers_in_millions"='8.4';

Question: how many episode have 8.4 millions  viewer.
SQL: SELECT COUNT("episode") FROM "table1_2112766_1" WHERE "viewers_in_millions"='8.4';