CREATE TABLE table_23499946_1 (title VARCHAR, us_viewers__in_millions_ VARCHAR)

What is the title when 2.50 is u.s. viewers (in millions)?
SELECT title FROM table_23499946_1 WHERE us_viewers__in_millions_ = "2.50"
SELECT "title" FROM "table_23499946_1" WHERE "2.50" = "us_viewers__in_millions_"