Something in the Water
 An irregular bout of coughs and colds has Dr Bob Strong worried, especially when he himself starts to cough up blood. Saskia Harden is persistently found submerged beneath bodies of water and is not on any files apart from at Dr Strong's GP practice. Torchwood have found a dead body in an advanced state of decay that is still able to talk. And all it can say is 'Water hag'...