Doctor Who: The Skull of Sobek

Too much perfection is dangerous. On the isolated planet of Indigo 3, far out in the wastes of the Blue Desert, lies the Sanctuary of Imperfect Symmetry. It is a place of contemplation and reflection. It is also a place of death. Something from another time, from another world, has found its way inside the hallowed walls. Something with a leathery hide, a long snout and sharp pointy teeth. Tick tock. Here comes the crocodile...