Galt (Vulcan)
Real world article
(written from a production point of view)
Galt was a Vulcanoid male welcomed back to Vulcan society by Sarek at the end of the first draft script of Star Trek III: The Search for Spock. He had been spying for the Klingons. It is not clear if he was Vulcan or Romulan. He beams up the survivors from the Genesis planet at the end of the movie. The character evolved in script rewrites and eventually became the Klingon Maltz.