Written For: Challenge 441: Underground at tw100.
Spoilers: General for the series.
Summary: Humans aren’t Cardiff’s only population.
Disclaimer: I don’t own Torchwood, or the characters.
Most of the time, to residents and tourists alike, Cardiff seems much like any other British city; it has all the expected public and private buildings. Businesses, retail districts, residential areas, a good transport system, pleasant parks, and even beaches, all serve a thriving human population.
Most people have no idea that beneath their feet, in dank tunnels deep underground, there’s another thriving population. Not of rats, although they certainly exist, but of grotesque alien creatures, stranded far from their home planet.
The two species generally manage to coexist peacefully, but it’s probably wise to stay out of the sewers…