The Enterprise beams the landing party down to a planet where
they encounter simple, child-like aliens in a Garden of Eden
The natives know nothing of love or sex. They turn out to be
controlled by a computer inside a cave with a dragon's head.
Kirk has the Enterprise phaser the cave, destroying it. Having
permanently altered the planet's society, the Enterprise exits.
For the World is Hollow,
Return of the Archons,
A Taste of Armageddon