Stardate: 3478.2  --Kirk and a landing party investigate a colony on Gamma Hydra 4 and find that most of the residents have died... of old age!They bring the last few survivors on board the Enterprise where they also die.Then it becomes apparent that everyone from the landing party is showing the same signs of accelerated aging. Only Chekov appears immune and they must find a cure before they all die of old age.

original airdate--December 8, 1967  Remastered date--November 10, 2007

music:Theme song  written by Alexander Courage

Goof--In the final shot, Chekov is suddenly wearing a wig instead of his natural hair. (The shot was obviously borrowed from an earlier episode.)

Trivia--William Shatner reportedly threatened producer Robert H. Justman with bodily harm after enduring many torturous hours during the old-age makeup process. "Who's afraid of such a wrinkled, feeble old coot!" scoffed Justman. Nevertheless, Justman locked his office door and hid under his desk until shooting was finished.

Space: the final frontier. These are the voyages of the starship Enterprise. Its five-year mission: to explore strange new worlds, to seek out new life and new civilizations, to boldly go where no man has gone before.