Question: What's the series number of the episode whose writer is David North?
SQL: SELECT MAX("No. in series") FROM "1-22078972-2" WHERE "Written by" = 'David North';

Question: What's the series number of the episode seen by 17.04 million people in the US?
SQL: SELECT MAX("No. in series") FROM "1-22078972-2" WHERE "U.S. viewers (millions)" = '17.04';

Question: What's the title of the episode first seen by 18.15 million people in the US?
SQL: SELECT "Title" FROM "1-22078972-2" WHERE "U.S. viewers (millions)" = '18.15';

Question: How many millions of people in the US saw the episode with series number 103?
SQL: SELECT "U.S. viewers (millions)" FROM "1-22078972-2" WHERE "No. in series" = 103.0;