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 them 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 played a significant part in human culture. In Norse mythology, Fenric was 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 him were called the Wolves of Fenric. (DW: The Curse of Fenric) Other evil wolves included the Big Bad Wolf. (DW: The Unquiet Dead)