A Klingon is an unexpected sight in Canada’s vast western plains, among the lonely oil wells, cow pastures and wheat fields. But hundreds of the ferocious warriors from Gene Roddenberry’s fictional <i>Star Trek</i> universe gathered in Vulcan this weekend for the town’s annual <i>Spock Days and Galaxyfest</i> — a three-day space festival and <i>Star Trek</i> convention.