The Enterprise discovers a planet exactly like Earth, but the only inhabitants are children who contract a fatal disease upon entering puberty.



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Episode complete credited cast:
Keith Taylor ...
Jahn's Friend
Ed McCready ...
Boy Creature
Kellie Flanagan ...
Blonde Girl
Stephen McEveety ...
Redheaded Boy (as Steven McEveety)
David L. Ross ...
Lt. Galloway (as David Ross)
Jim Goodwin ...
John Megna ...
Little Boy


The Enterprise receives an old style SOS signal and finds on arrival a planet that is virtually identical to Earth. Kirk, Spock, McCoy and Yeoman Rand beam down to the planet only to find that it is inhabited solely by children. Kirk befriends one of the older children, Miri, but they soon learn that experiments to prolong life killed all of the adults and that the children will also die when they reach puberty. They also learn that the children are in fact, very old. Soon, the landing party contracts the virus and has seven days to find a cure. Written by garykmcd

Plot Summary | Plot Synopsis

Plot Keywords:

puberty | virus | cure | boy | child | See All (45) »


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Release Date:

27 October 1966 (USA)  »

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Aspect Ratio:

1.33 : 1
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Did You Know?


In Captain's Log: William Shatner's Personal Account of the Making of Star Trek V: The Final Frontier and later in her personal blog, William Shatner's middle daughter, Lisabeth Shatner, who was five years old, described her time on the set, describing her fear and confusion during the filming of this episode. She also described her encounters with the other children, her father, and the production staff:

"... once we entered the set and were directed to the costume room ... someone handed me a box with a costume in it, and told me to put it on. Since Halloween was one of my favourite holidays, I opened the box eagerly - I was getting a chance to dress up, and it wasn't even Halloween! However, my excitement was somewhat lessened when I saw the costume. It was a beige, apron-like dress with the words "I Spy" printed on the left pocket. Even at the age of five, I considered myself too mature to wear such a silly costume. I spent the next hour with my left hand over the print ... my mother made matters worse when she asked the costumer if they had any green wigs left. She had seen a little girl walk by with a wig of long, green ratty hair and she wanted one for me. I breathed a sigh of relief when she was informed none were left."

After they left the costume room: "Leslie, who was also appearing in the episode (and got a much better costume than I did), accompanied me to the make-up room to visit dad. When we walked into the room, he was sitting in the make-up chair, his back to us. We ran forward excitedly, relieved to see his familiar outline. When he turned towards us, I caught a glimpse of his arm and saw the skin on the inside of his elbow was covered with a long, bluish-red scab! I blanched, and my dad burst out laughing, and told us to touch the sore. It was made of rubber - at that moment, I realized everything was "pretend." Once I understood that, I relaxed." Only with blood on his hands

Afterward, she and her sister were taken to the set and "a make-up man came around and put dirt smudges on our faces, something which Leslie didn't appreciate very much." When shooting began, she confessed her confusion: "Finally, my father started talking. I understood that his words belonged to the "pretend" realm, but what he was saying still didn't make much sense. "Look at your hands," he commanded. "They have blood on them." When no one moved, he stopped talking. "Well, look at them," he said, and all the kids looked down at their hands. I followed suit, but didn't see anything unusual. I wondered why he told me there was blood on my hands when there wasn't any."

"The next scene didn't clear up my confusion. [ Keith Taylor ] was told to pick me up and carry me towards my father, whereupon I was supposed to take a swipe at my father's face. I knew this part was "pretend." In fact, I couldn't keep a smile off my face every time I got close to hitting him. My father kept saying, "No, no you can't smile," every time I grinned. We had to do it four or five times before I finally could keep a straight face. I wasn't entirely sure why I was supposed to look as if I meant to hit him."

For the last scene Lisabeth was, where Kirk and the Onlies run to the lab: "My father entered carrying me, and set me down next to the actress playing Janice Rand, who was kneeling on the floor. The scene took a long time to film. Eventually, I began looking around the room, and discovered I had a bird's eye view of the top of the actress's head. I was utterly fascinated by her hair, which was woven into a chequered pattern on top. I stared at that hair for a long time, wondering if it was possible to actually play checkers on it." See more »


When the Enterprise is in orbit, the planet in the background is clearly Earth. The Middle East to be precise. See more »


Yeoman Rand: Miri... she really loved you, you know?
Capt. Kirk: Yes.
Capt. Kirk: I never get involved with older women, Yeoman.
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Featured in Bring Back... Star Trek (2009) See more »


Theme From Star Trek
Written by Alexander Courage
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User Reviews

Just Who Made Their Clothes?
25 April 2014 | by (United States) – See all my reviews

Kirk and the gang encounter a group of children, living on a planet where the adults seem to have disappeared a long time ago. Upon arrival, they find a man dying in agony and don't understand the how he arrived at his condition. Investigating further, they come upon what appear to be children who act like six year olds, even though they are actually 300 years old. Dr. McCoy comes to the conclusion that there is something about the planet that causes a horrible demise when puberty is reached. Kirk tries to negotiate with the kids because they think the adults are responsible. Kirk meets Miri (Kim Darby) who develops a crush on him. Unfortunately for her, she is beginning to show symptoms similar to the dying man. She has another ally, a young man played by the very strange Michael J. Pollard who was the driver in the "Bonnie and Clyde." The kids just won't trust the crew and this presents a problem for Kirk, who begins to turn on the charm. The kids are really freaky and play violent games and won't listen to reason. Why after 300 years they have not evolved any further than they have is a real mystery. Will the condition that is affecting Miri be circumvented? That is the question.

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