Question: How many season numbers are there for the episode seen by 13.54 million people in the US?
SQL: SELECT COUNT("No. in season") FROM "1-23528223-2" WHERE "U.S. viewers (millions)" = '13.54';

Question: What's the series number of the episode directed by Skipp Sudduth?
SQL: SELECT "No. in series" FROM "1-23528223-2" WHERE "Directed by" = 'Skipp Sudduth';

Question: Who wrote the episode seen by 10.64 million people in the US?
SQL: SELECT "Written by" FROM "1-23528223-2" WHERE "U.S. viewers (millions)" = '10.64';

Question: Who directed the episode titled "Redemptio"?
SQL: SELECT "Directed by" FROM "1-23528223-2" WHERE "Title" = '"Redemptio"';