Wall Street Journal: The legal battle over Sumner Redstone’s mental competence, which finally heads to court this week after transfixing Hollywood and Wall Street for months, features a cast of characters befitting a reality TV show. Besides Redstone, the 92-year-old chairman emeritus and controlling shareholder of Viacom and CBS, there is his much younger ex-girlfriend-turned-companion, a once-estranged daughter, an unpredictable granddaughter, an embattled CEO and a nurse who wields unusual power in Redstone’s Beverly Park mansion because he interprets the ailing billionaire’s extremely impaired speech.