Geoffrey Beevers reads this exciting novelisation of a 1980 TV adventure featuring the Fourth Doctor, as played by Tom Baker. The Doctor, Romana and K9 - and a young stowaway called Adric - are trapped in the alternative universe of E-Space. Seeking help, they land on an unknown planet. There they find a nightmare world where oppressed peasants toil for the Lords who live in the Tower and where all learning is forbidden: a society in a state of decay. What is the terrifying secret of the Three Who Rule? What monstrous creature stirs beneath the Tower, waking from its thousand-year sleep? The Doctor discovers that the oldest and deadliest enemy of the Time Lords is about to spring into horrifying action. John Leeson provides the Voice of K9.