The bishops don’t necessarily condemn the depiction of evil, but they would draw the line at titillation:
Finally, the narration, description or portrayal of moral evil, even through the media of social communication, can indeed serve to bring about a deeper knowledge and study of humanity and, with the aid of appropriately heightened dramatic effects, can reveal and glorify the grand dimensions of truth and goodness. Nevertheless, such presentations ought always to be subject to moral restraint, lest they work to the harm rather than the benefit of souls, particularly when there is question of treating matters which deserve reverent handling or which, given the baneful effect of original sin in (people), could quite readily arouse base desires in them.
One challenge often considered is the portrayal of the end result of a struggle between good and evil. All too often, evil seems temporarily victorious, and to suggest otherwise would be the height of naivete.