Cho-Je

K'anpo Rimpoche was a Time Lord who forsook Gallifreyan society to live as a Buddhist abbot on late 20th century Earth.

Biography
When K'anpo was struck down by the Eight Legs possessing his own meditation students as human hosts, Cho Je, his assistant, faded into nothingness and then re-appeared, taking the place of K'anpo Rimpoche. He had regenerated. The Time Lord corrected Tommy when he addressed him as "Cho Je", maintaining that he was K'anpo.

After the Doctor's confrontation with the Great One in her cave, he began to die from the radiation there. Once the Doctor had returned in the TARDIS to UNIT HQ, K'anpo Rimpoche teleported to him to give the Doctor "a little push" enabling him to regenerate into his next incarnation. (TV: Planet of the Spiders)