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The Borad, formerly Megelen, took over the planet Karfel and created the Timelash before his eventual defeat by the Sixth Doctor.
The Karfelons used "Borad" as a title, like President, rather than a name. Yet when Megelen took power he referred to himself only by his title. A scientist, he had been exposed by the Third Doctor to the ruling Council for unethical experiments on Morloxes, large reptiles indigenous to Karfel, and the chemical Mustakozene-80, which fused different tissue as one creature.
After the Doctor left Karfel, Megelen was apparently able to continue his experiments, but was accidentally fused with one of the Morloxes via Mustakozene-80, becoming half Morlox and half Karfelon. He believed that his intelligence and longevity had increased.