CREATE TABLE table_4075 ("No." FLOAT, "#" FLOAT, "Title" TEXT, "Directed by" TEXT, "Written by" TEXT, "U.S. air date" TEXT, "Production code" TEXT, "U.S. viewers  ( million ) " TEXT)

What are the titles of episodes with 5.66 million US viewers?
SELECT "Title" FROM table_4075 WHERE "U.S. viewers (million)" = '5.66'
SELECT "Title" FROM "table_4075" WHERE "U.S. viewers (million)" = '5.66'