code: def get_object(self, queryset=None):
          
          if settings.PODCAST_SINGULAR:
              show = get_object_or_404(Show, id=settings.PODCAST_ID)
          else:
              show = get_object_or_404(Show, slug=self.kwargs['show_slug'])
          obj = get_object_or_404(Episode, show=show, slug=self.kwargs['slug'])
          index = Episode.objects.is_public_or_secret().filter(show=show, pub_date__lt=obj.pub_date).count()
          obj.index = index + 1
          obj.index_next = obj.index + 1
          obj.index_previous = obj.index - 1
          return obj
docs: Return object with episode number attached to episode.