Bor

Bor was one of the Vanir on Terminus. Upon discovering that Terminus's engine was leaking radiation, Bor entered the Forbidden Zone and attempted to repair it, only to be injured while doing so. He was found by the Fifth Doctor and Kari. The Garm later brought him back from the Zone. The other Vanir and he were freed when Nyssa offered to synthesise Hydromel for them.

Biography from the TARDIS Data Core article, licensed under CC-BY-SA