|Rank or Companion position||Unknown|
|Age||at least 5|
|Based off of||Ben|
|Description||huge white tom with jet-black paws|
Blackfoot was the first companion to witness the Doctor's regeneration, along with Petalfur, but he was skeptical about if the new Second Doctor was an imposter or the real cat. He eventually was forced to believe it was the real Doctor when a Dalek recognized him.
- Because of his six-toed paws, Blackfoot was able to grip things almost like a human, which was useful in many of the Doctor's adventures.