CREATE TABLE table_23399481_4 (title VARCHAR2, us_viewers__in_millions_ VARCHAR2)

What are the titles of the episodes which had 1.10 million U.S. viewers?
SELECT title FROM table_23399481_4 WHERE us_viewers__in_millions_ = "1.10"
SELECT "title" FROM "table_23399481_4" WHERE "1.10" = "us_viewers__in_millions_"