Chanting hooded figures gather inside a ring of ancient stones, using rituals of blood sacrifice to awaken the sleeping evil of the Ogri. The Doctor and Romana go from the countryside of present day England to a deep-space cruiser trapped in hyperspace in their attempt to track down an alien criminal, and unravel the mystery of the Stones of Blood. Luckily they have the help of the faithful K9 … `Terrance Dicks is a skilful professional storyteller …. He has deftly recaptured the programme’s popular blend of hectic menace and humorous self-mockery’ BRITISH BOOK NEWS