Question: How many directed by have 2.80 as u.s. viewers  (in millions)?
SQL: SELECT COUNT("Directed by") FROM "1-23499946-1" WHERE "U.S. viewers (in millions)" = '2.80';

Question: What is the title when 2.50 is u.s. viewers (in millions)? 
SQL: SELECT "Title" FROM "1-23499946-1" WHERE "U.S. viewers (in millions)" = '2.50';

Question: How many u.s. viewers  (in millions) have "Dare Devil" as the title?
SQL: SELECT "U.S. viewers (in millions)" FROM "1-23499946-1" WHERE "Title" = '"Dare Devil"';

Question: What is the original air date when "Poison Ivy" is the title?
SQL: SELECT "Original air date" FROM "1-23499946-1" WHERE "Title" = '"Poison Ivy"';