Question: What is the number in the season that Marlene Meyer wrote and 20.49 million people watched?
SQL: SELECT MAX("No. in season") FROM "1-10718984-2" WHERE "Written by" = 'Marlene Meyer' AND "U.S. viewers (millions)" = '20.49';

Question: When did the no. 23 show originally air?
SQL: SELECT "Original air date" FROM "1-10718984-2" WHERE "No. in season" = 23.0;