Fox (Frayed)

A canine species with shiny black skin were called "foxes" by humans on Iwa, due to their appearance. They were highly intelligent, had psychic abilities and could undergo complete molecular disassembly, before being reassembled elsewhere. The First Doctor theorised that this ability was genetically engineered, rather than evolved.

The "foxes" came to Iwa seeking the services and facilities of the humans stationed there, and at first contact killed three of their soldiers. A bloody war ensued, which lasted months Eventually, they gained access to the facility known as the Refuge, and established control over it and had the humans working for them. With the knowledge that once they'd achieved their goal, the "foxes" would leave, the First Doctor and Susan quietly slipped away from the planet. (PROSE: Frayed)