CREATE TABLE table_18041 ("No. in series" FLOAT, "No. in season" FLOAT, "Title" TEXT, "Directed by" TEXT, "Written by" TEXT, "Original air date" TEXT, "Production code" FLOAT, "U.S. viewers  ( millions ) " TEXT)

Which episode was watched by 11.75 million U.S. viewers?
SELECT "Title" FROM table_18041 WHERE "U.S. viewers (millions)" = '11.75'
SELECT "Title" FROM "table_18041" WHERE "U.S. viewers (millions)" = '11.75'