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

Question: On the episode that had a run time of 24:57, how many million viewers were there?
SQL: SELECT "viewers_in_millions" FROM "serial_details_by_episode" WHERE "run_time"='24:57';