Publicity photo, “Miri”

About this episode, Gene Roddenbery told Daily Variety:

Kids reach their maturity at 12. As they reach maturity they go downhill. They are lovely and pure at 12… [“Miri” screenwriter] Adrian Spies and I were talking about our kids, and out came a story by him on bacteriological warfare which kills all the adults on a planet. All the children escape this, and remain children forever. The kids are three centuries old when we come on their planet. This is how sci-fi should be done – magnifying of a situation, and dramatize it. Sci-fi gives you selected magnification.“