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. Don's "post" was in the Auxiliary Control room, where he prevented anyone from attempting to regain control of the starship. (TOS: "And the Children Shall Lead")