CBS chooses 'nuclear option' against Shari Redstone: It sues to thwart Viacom merger

Such fear is understandable. Only two years ago, Shari Redstone and her ailing father, Sumner Redstone, unilaterally made changes to Viacom’s board, which immediately tilted the balance of power and led to sweeping management changes. According to CBS’ lawsuit, Shari Redstone had been quietly interviewing candidates to replace Moonves.