Wolf

The wolf was a predatory mammal on Earth and Marinus. It was similar to the domesticated dog.

Timber wolves (DWN: Doctor Who and the Keys of Marinus) on Marinus ranged in packs of twenty. In cold winters they grew hungry and sometimes raided villages at night. The scent of raw meat could attract the wolves from miles away. Ian Chesterton and Altos were pursued by a pack of these wolves after, unknown to them, Vasor gave them a bag of raw meat. Vasor claimed to have once broken a wolf's back with his bare hands. (DW: The Keys of Marinus)

Wolves have played a significant part in human culture. In Norse mythology, Fenric was described as a monstrous wolf which would, during the final battle between gods and beasts, destroy the world at the end of time. The people Fenric manipulated into freeing himself were known as the Wolves of Fenric. (DW: The Curse of Fenric) Other evil wolves included the Big Bad Wolf. (DW: The Unquiet Dead)

One of the prisoners of the Glass Prison was a woman known as the Wolf. (BFBS: The Glass Prison)

The Killorans seemed to be descended from wolves or wolf-like creatures. (BFBS: The Doomsday Manuscript)