Question: Name the number air date for 14.20 us viewers
SQL: SELECT COUNT("Original air date") FROM "1-16617011-1" WHERE "U.S. viewers (millions)" = '14.20';

Question: Name the directed by for 15.15 viewers
SQL: SELECT "Directed by" FROM "1-16617011-1" WHERE "U.S. viewers (millions)" = '15.15';