It’s the middle of the twenty-first century, but the November fog is not so different from what it was in fin de siecle nineteenth-century London. The soup may not be quite as thick, but it boasts a more powerful cocktail of pathogens and chemical pollutants. The famous fog also still provides cover for those who want to slip unseen into the shadows, especially closer to the River Thames, where most of the street lights have been shot out.