Stanley Barton was the Watcher of Theo Montclief from 1987 to 1989. Thereafter he observed Xavier St. Cloud from 1989 to 1994. Although he was partway replaced by Robert Louis in 1990. Barton helped James Horton to locate Xavier. And later worked together with them to lure Duncan MacLeod into a trap. After the deaths of Xavier and Horton, Barton dissapeared. He is still searched by the Watcher's for his part in Horton's conspiracy.