How many episodes had a broadcast date and run time of 24:43?
CREATE TABLE "serial_details_by_episode" (
  "episode" text,
  "broadcast_date" text,
  "run_time" text,
  "viewers_in_millions" text,
  "archive" text
);
SELECT COUNT("broadcast_date") FROM "serial_details_by_episode" WHERE "run_time"='24:43';