CREATE TABLE table_31327 ("Series #" FLOAT, "Title" TEXT, "Directed by" TEXT, "Written by" TEXT, "Original air date" TEXT, "Production code" TEXT, "U.S. viewers  ( million ) " TEXT)

What is the title when the series # is 7?
SELECT "Title" FROM table_31327 WHERE "Series #" = '7'
SELECT "Title" FROM "table_31327" WHERE "Series #" = '7'