This ninth instalment in the “Saw” franchise of horror films, is based on the victims’ past wrongdoing or lack of appreciation of the lives they have led, the purported agenda of the new killer is to achieve reform of the police force by slaughtering rogue cops. The result is yet another perverse celebration of sadism. A vengeance theme, pervasive gory violence, including hideous torture, frequent profanities, much rough language. By Kurt Jensen/CNS.