Don Linden was one of the child survivors of the Starnes Exploration Party on Triacus in 2268. Seemingly unfazed by the death of his parents, Don was an unwilling follower of the entity Gorgan. He, and the other children, were coerced by Gorgan to take the USS Enterprise to Marcos XII, to spread the evil entity's persuasion. Shortly after the funeral conducted by Captain James T. Kirk, Don knocked over the United Federation of Planets flag planted by the burial site. He then apologized after Kirk cautioned him to be careful. Don Linden was played by actor Mark Robert Brown.