Location: Cardiff, Wales Date: 24th December, 1869 Enemy: The Gelth The Doctor plans to take Rose back through time to Naples, 1860, but instead they arrive in Cardiff, 1869. In Victorian Cardiff, the dead are walking and creatures made of gas are on the loose. The time-travellers team up with Charles Dickens to investigate Mr Sneed, the local undertaker, who’s hiding a very big secret. However, this time, The Doctor won’t be able to save everyone.