Question: How many original airdates did season 20 have?
SQL: SELECT COUNT("Original air date") FROM "1-22181917-2" WHERE "Season #" = 20.0;

Question: Who directed the episode that was watched by 6.62 million U.S. viewers?
SQL: SELECT "Directed by" FROM "1-22181917-2" WHERE "U.S. viewers (millions)" = '6.62';

Question: What is the production code for the episode with 8.56 million U.S. viewers?
SQL: SELECT "Production code" FROM "1-22181917-2" WHERE "U.S. viewers (millions)" = '8.56';

Question: What is the title of the episode that had 9.76 million U.S. viewers?
SQL: SELECT "Title" FROM "1-22181917-2" WHERE "U.S. viewers (millions)" = '9.76';