"Nip/Tuck" (10 p.m., FX): The identity of The Carver serial killer is promised in the two-hour season finale of "Nip/Tuck." If past finales are any indication, the revelation will be a shocker. For

"Nip/Tuck" (10 p.m., FX): The identity of The Carver serial killer is promised in the two-hour season finale of "Nip/Tuck." If past finales are any indication, the revelation will be a shocker. For two seasons, the white-masked maniac has been causing problems for the good (and not-so-good) people of Miami. He (or she) has abducted victims and ripped their pretty little faces. Who could it be? The wayward Dr. Sean? The dark Dr. Christian? The possessive Julia? Maybe Joan Rivers? (Hey, she's been on the show a couple of times and is a huge fan.)