A popular component of an adventure story is the discovery of a hidden or lost civilisation. Atlantis, Muir, Lyonesse and many other mythological cities and countries are rich fodder for writers of speculative fiction. This week the dragons delve into the possible explanations behind the myths and look at interesting gaps in historical record which might have given rise to stories of lost cities and continents, before taking a stroll through SFF which has used this source as inspiration. On the slab this week - Atlantis, Dinotopia and many more.

Title music: Ecstasy by Smiling Cynic