CREATE TABLE table_28252 ("No." FLOAT, "#" FLOAT, "Title" TEXT, "Director" TEXT, "Writer ( s ) " TEXT, "Original air date" TEXT, "Prod. code" FLOAT, "U.S. viewers  ( million ) " TEXT)

Which episodein season 3 had 175020 for a production code?
SELECT "#" FROM table_28252 WHERE "Prod. code" = '175020'
SELECT "#" FROM "table_28252" WHERE "Prod. code" = '175020'