The Tom Cruise Image Rehabilitation Tour rolls on today with a public pardon from Viacom kingpin Sumner Redstone, who followed his prodigal son's subdued Oprah stint with a reassurance that, you know, all that erratic-behavior outrage from a couple years back? Just kidding! And Mission: Impossible 4? It's "up to Brad Grey." Or, loosely translated, "Are we on number four? Already? Well, I'll be":