Question: What is the original air date of season 9?
SQL: SELECT "Original air date" FROM "1-18217753-1" WHERE "Season #" = 9.0;

Question: Who were the writers when there were 27.11 million viewers?
SQL: SELECT "Written by" FROM "1-18217753-1" WHERE "U.S. viewers (millions)" = '27.11';

Question: How many series had viewers totaling 23.93 million?
SQL: SELECT COUNT("Series #") FROM "1-18217753-1" WHERE "U.S. viewers (millions)" = '23.93';

Question: How many original air dates totaled 26.06 million viewers?
SQL: SELECT COUNT("Original air date") FROM "1-18217753-1" WHERE "U.S. viewers (millions)" = '26.06';