I don't know if Friday will mark the end of Fringe. Fox is a bit different than other networks. The X-Files moved around a bit and survived for many years on Sunday of all nights. Fox usually doesn't have a problem just ending a show outright, so Fringe must still be doing well enough for them. It will at the very least give my PVR a small break on Thursday nights which is otherwise pretty busy. It used to be even busier when Barbeque Pit Masters and American Chopper were still on.