Minyan

The Minyans were a race of humanoids which were encountered by the Time Lords early in their history.

When the Time Lords first developed time-travel, they discovered Minyos and the native Minyans. The Time Lords decided to give some of their advanced technology to the Minyans, who worshipped them as gods. This technology included the ability to regenerate with a mechanical help. Eventually, the Minyans became jealous of the Time Lords and angry with the Time Lords' power and they drove the Time Lords off Minyos. Shortly afterwards, the Minyans were involved in a civil war using the Time Lord technology which destroyed the planet (though they were able to send off a few spaceships).

After this disaster, the Time Lords vowed never to interfere with other cultures.