Quinn was the deputy governor of the human colony on Vulcan.
Aware of Hensell's ineffectiveness, he secretly contacted Earth and asked for the Examiner to help deal with the colony's rebels. He was later framed by Bragen for rebel activity, attacking the Second Doctor and sabotaging the colony's communications system.
Quinn was later joined by the Doctor in the colony's prison. From there he was surprised to discover the Doctor was not the real Examiner.
After the Doctor freed him, he helped the Doctor destroy the Daleks. After Hensell's death, he became the governor of the colony. (TV: The Power of the Daleks)
