Question: When did series 6 start?
SQL: SELECT "Start date" FROM "1-24057191-2" WHERE "Series" = 6.0;

Question: What series had an average of 3.72 million people watching it?
SQL: SELECT MAX("Series") FROM "1-24057191-2" WHERE "Average viewers (millions)" = '3.72';

Question: How many different end dates are there for the series seen by 4.2 million people?
SQL: SELECT COUNT("End date") FROM "1-24057191-2" WHERE "Average viewers (millions)" = '4.2';