CREATE TABLE table_16440 ("No. in series" FLOAT, "No. in season" FLOAT, "Title" TEXT, "Directed by" TEXT, "Written by" TEXT, "Original air date" TEXT, "U.S. viewers  ( millions ) " TEXT)

How many episodes had 16.03 million viewers?
SELECT COUNT("No. in series") FROM table_16440 WHERE "U.S. viewers (millions)" = '16.03'
SELECT COUNT("No. in series") FROM "table_16440" WHERE "U.S. viewers (millions)" = '16.03'