The New York Times takes a close look at Sumner M. Redstone, chairman and controlling shareholder of Viacom and CBS, who turns 85 next month. Three years after splitting his cable and broadcast TV companies, it's unclear what would happen to the companies when he is gone. He is feuding with his daughter, Shari Redstone, and trying to remove her from the boards of Viacom and CBS, and his nephew is suing him over shares in the family business. Now CBS is about to lose the "most watched" TV crown to Fox, and some are questioning if the split was the right move. And Mr. Redstone steadfastly refuses to discuss succession, saying he works out for 70 minutes a day and eats "every antioxidant known to man" to stave off aging.