Question: What number episode was Week 4, Part 1? 
SQL: SELECT "Episode Number" FROM "1-25391981-20" WHERE "Episode" = 'Week 4, Part 1';

Question: For what episode was the rating/share for 18-49 at 2.8/8
SQL: SELECT "Episode" FROM "1-25391981-20" WHERE "Rating/Share (18–49)" = '2.8/8';

Question: What number episode was Week 4, Part 2?
SQL: SELECT "Episode Number" FROM "1-25391981-20" WHERE "Episode" = 'Week 4, Part 2';

Question: How many viewers in millions watched the episode with the number 10.18?
SQL: SELECT "Viewers (millions)" FROM "1-25391981-20" WHERE "Episode Number" = '10.18';

Question: What is the rating/share for 18-49 for Week 6, Part 1?
SQL: SELECT "Rating/Share (18–49)" FROM "1-25391981-20" WHERE "Episode" = 'Week 6, Part 1';

Question: What is the weekly rank of the episode with a 14 share whose original airdate was April 20, 2010? 
SQL: SELECT "Weekly Rank" FROM "1-25391981-20" WHERE "Share" = '14' AND "Original Airdate" = 'April 20, 2010';