CREATE TABLE table_24932 ("No. in series" FLOAT, "No. in season" FLOAT, "Title" TEXT, "Directed by" TEXT, "Written by" TEXT, "Original air date" TEXT, "Production code" TEXT, "U.S. viewers  ( million ) " TEXT)

Name the viewers for production code for 3x6704
SELECT "U.S. viewers (million)" FROM table_24932 WHERE "Production code" = '3X6704'
SELECT "U.S. viewers (million)" FROM "table_24932" WHERE "Production code" = '3X6704'