Tiger (Old Flames)

The Tigers were a species of shapeshifters. They could take the form of a human or a tiger.

The tigers were nearly wiped out, but two were able to escape to Earth, later to be known as Lady Huntingdon and Bella Huntingdon. Lady Huntingdon planned to find a way back in time and tried to steal Iris Wildthyme's TARDIS. The Fourth Doctor was able to seal her inside a message pod. Her granddaughter stayed on Earth and married Turner, Iris' abandoned companion. (ST: Old Flames)