Sloathes were a species encountered by the Doctor, Bernice Summerfield, Chris Cwej, and Roz Forrester in a place called the System, a pocket dimension comprised of multiple dimensions.
Possibly native to the System (specifically within Planet X), the Sloathes were able to shapeshift - usually appearing as extremely complex and abstract forms. Sloathe psychology was largely based on external forces - with the Sloathes working for the extremely vicious Solan becoming as vicious as him. Most Sloathes use a unique dialect of English (putting "Is" at the beginning of sentences and using "hominids" instead of people to refer to groups of non-Sloathes). (PROSE: Sky Pirates!) One of its members, called Sgloomi Po, had escaped into the universe Benny and the Doctor normally habituated. Sloathes were both metamorphic and single-gendered, something that caused Benny to think of Sgloomi as a "hir", not a "him" or a "her". Consequently, Sloathes like Sgloomi had difficulties understanding human sexuality. (PROSE: Oblivion)
Notes[]
- Though not stated within Heart of TARDIS or The Slow Empire, the Collectors (a species showcased in both books named) could be a group of Sloathes who managed to escape the System or N-Space analogues for the Sloathes.