The BBC blurb for this episode reads: "Something ghastly is afoot in Victorian Yorkshire, as bodies are found with their skin a waxy, glowing red." Sounds terrifying, but I am more intrigued by the vision of Clara in Victorian garb again. Will the mystery of Clara take any steps forward this week? Plus, this episode we get to see the brilliant Strax again, with his disdain for humans and lack of social etiquette. It should be a good one.