Gelth
![](https://whobackwhen.com/wp-content/uploads/gelth-doctor-who-back-when.jpg)
The Gelth were inter-dimensional beings who were able to take control of corpses, and who appeared in a ghostly, gaseous form, often mistaken for wraiths or ghosts themselves.
Podcast
N003 The Unquiet Dead
Doc and Rose accidentally materialise in Cardiff and go Ghostbusting with Charles Dickens.