'When the barrier gives way, this planet will be flooded by all the evil in N-Space; and at the moment I have no idea how to stop it. ' The Brigadier's ancient great-uncle Mario seems unsurprised by the spectres which haunt his even more ancient Sicilian castle. But when the Doctor comes to investigate he finds himself faced with a danger as great as any he has yet encountered. Is the answer to be found in the past, in the corrupt alchemy of the black-hearted sorceror said to have been walled up alive for his evil deeds$305 Or must the Doctor - and the faithful Sarah Jane Smith - brave the realm of ghosts and face the very fiends of hell$306 The classic team of the Doctor, Sarah Jane and the Brigadier are on the case in this eerily thrilling adventure, written especially for radio by Barry Letts. . . .
