CREATE TABLE table_74173 ("Series #" FLOAT, "Title" TEXT, "Directed by" TEXT, "Written by" TEXT, "Original air date" TEXT, "Production code" FLOAT, "U.S. viewers  ( million ) " TEXT)

What is the title of the series # 8?
SELECT "Title" FROM table_74173 WHERE "Series #" = '8'
SELECT "Title" FROM "table_74173" WHERE "Series #" = '8'