CREATE TABLE table_16618 ("No. in series" FLOAT, "Title" CLOB, "Directed by" CLOB, "Written by" CLOB, "Featured character ( s ) " CLOB, "Original air date" CLOB, "U.S. viewers  ( million ) " CLOB)

What are the title that have 19.48 million u.s. viewers?
SELECT "Title" FROM table_16618 WHERE "U.S. viewers (million)" = '19.48'
SELECT "Title" FROM "table_16618" WHERE "U.S. viewers (million)" = '19.48'