The Borad
The Borad began life as a scientist of the planet Karfel named Megelen, who was encountered in an as-yet unrecorded adventure by the Third Doctor, Jo Grant and an unnamed second companion (most likely Captain Mike Yates of UNIT.) During that time, the Doctor exposed Megelen to the ruling Council for unethical experiments on Morloxes, large lizards indigenous to Karfel, and the chemical Mustakozene-80, which has the ability to fuse together different tissue as one creature.
After the Doctor left Karfel, Megelen was apparently able to continue his experiments, but was injured during an accident and was fused with one of the Morloxes, becoming a wheelchair-bound half-reptile/half-Karfelon. Megelen also experiments with cloning technology, creating at least one duplicate of himself after the accident. He is also able to install himself as the sadistic and despotic ruler of Karfel under the name of the Borad. He never reveals himself in person, only via security monitors which reveal him to be a dignified old man. Mirrors are banned. Fear is enforced rigidly through the policing of androids; and all rebels are dealt with either by summary execution or despatch and death via the Timelash - a permanent, and ultimately fatal, exile down a corridor of time and space, which ends in a point in 1179 in Scotland on Earth.
Under the Borad’s rule, the Karfelon people become disillusioned, rebellious and miserable, and relations break down with their former allies, the Bandrils, who threaten war after the Borad rescinds the grain supply treaty which underpinned the relationship between the two civilizations. This is a deliberate plan on Megelen’s part to provoke a war with the Bandrils that will result in their use of bendalypse warheads which will wipe out all the Karfelons – but leave the Morlox and himself alive, allowing him to repopulate the world in his own image.
The Doctor is ultimately able to defeat the Borad when Megelen is made unbalanced by the image of himself in a boarded-up mirror, revealing the reason he hid himself away, and in this state is thrown into the Timelash by the Doctor. The Doctor speculates that the Borad will become the Loch Ness Monster.
