On Exo III, a duplicate of Brown returns to Korby's laboratory to find the other androids dead. Using the records, he is able to construct another android of Kirk, who takes charge of their operation. The Enterprise helps evacuate an island on the planet T'nufo which is about to be struck by meteors. During the mission, Kirk saves the life of a young native, K'leb, and, as a result, K'leb is bound to serve him for a year or until he saves his life. Reluctantly, Kirk takes K'leb aboard the ship as an honorary crewmember.