The Doctor remembers Dulkis from a previous visit as a civilised and peaceful place. But times have changed, and his second trip in not quite the holiday he was expecting.

The Dulcians themselves are more reluctant than ever before to engage in acts of violence. The so-called Island of Death, once used as an atomic test site, has served as a dire warning to generations of Dulcians of the horrifying consequences of warfare. But an alien race prepares to take advantage of their pacifism...

The whole planet and its passive inhabitants are threatened with complete annihilation - and no one, it seems, is going to lift a finger to stop the evil Dominators and their unquestioning robot slaves.

Novelization of the Doctor Who TV series; five episode story "The Dominators" (1968), script by Mervyn Haisman & Henry Lincoln (writing as Norman Ashby).