Question: What was the title of the episode with 5.04 million viewers?
SQL: SELECT "Original title" FROM "1-17641206-4" WHERE "Viewership" = '5.04 million';

Question: What was the first airdate with a viewership of 4.77 million?
SQL: SELECT "Original airdate" FROM "1-17641206-4" WHERE "Viewership" = '4.77 million';

Question: How many episodes  of 30 minutes were written by John Sullivan?
SQL: SELECT COUNT("Duration") FROM "1-17641206-4" WHERE "Written by" = 'John Sullivan';

Question: Who was the director when the writer was John Sullivan?
SQL: SELECT "Directed by" FROM "1-17641206-4" WHERE "Written by" = 'John Sullivan';