The presence of the investigator who is credited with unmasking notorious DJ and charity pedophile Sir Saville should not convince anyone to waste their time here. Over four and three episodes, respectively, these two criminal investigations are simultaneously sensationalist and utterly boring (a significant achievement), replacing development with endless repetition, supposition and speculation. In the end, nothing is unearthed that wasn't known from the start, and the biggest mystery is no longer 'Who dunnit?' but 'why make it?'