CREATE TABLE table_22211 ("Series #" FLOAT, "Season #" FLOAT, "Title" TEXT, "Directed by" TEXT, "Written by" TEXT, "Original air date" TEXT, "U.S. viewers  ( millions ) " TEXT)

What is the title when 18.58 u.s. viewers (millions) watched?
SELECT "Title" FROM table_22211 WHERE "U.S. viewers (millions)" = '18.58'
SELECT "Title" FROM "table_22211" WHERE "U.S. viewers (millions)" = '18.58'