Question: When 3 is the bbc three weekly ranking what is the airdate?
SQL: SELECT "Airdate" FROM "1-24399615-8" WHERE "BBC Three weekly ranking" = '3';

Question: When 656000 is the amount of viewers and N/A is the cable rank what is the airdate?
SQL: SELECT "Airdate" FROM "1-24399615-8" WHERE "Cable rank" = 'N/A' AND "Viewers" = 656000.0;