Question: What was the original U.S. air date of the episode directed by Julian Petrillo?
SQL: SELECT "Original U.S. air date" FROM "1-25246990-5" WHERE "Directed by" = 'Julian Petrillo';

Question: How many different original U.S. air dates appear where the U.S. viewers were 2.5 million?
SQL: SELECT COUNT("Original U.S. air date") FROM "1-25246990-5" WHERE "U.S. viewers (millions)" = '2.5';

Question: How many U.S. viewers were there for the episode written by Lazar Saric & Jed Spingarn?
SQL: SELECT "U.S. viewers (millions)" FROM "1-25246990-5" WHERE "Written by" = 'Lazar Saric & Jed Spingarn';

Question: How many U.S. viewers were there for the number 4 episode in season?
SQL: SELECT "U.S. viewers (millions)" FROM "1-25246990-5" WHERE "No. in season" = 4.0;