Confidently following in the footsteps of Sir Peter Ustinov and Klaus Maria Brandauer was always going to be a tough ask, and sadly Hans Matheson isn’t really up to it. To be fair, that isn’t entirely his fault. This whole meandering drama tries to abridge it’s Robert Graves and it’s Suetonius into three hours and that was simply never going to be enough airtime to do justice to all the plotting and depravity of the Neronic reign by itself, let alone try to incorporate aspects from those of Caligula (John Simm) and Claudius (Massimo Dapporto) into it, too. Curiously, the thrust of much of…