A group of brats under the leadership of the Friendly Angel steal the
Enterprise, after killing their parents. The Friendly Angel convinced them
that with their parents out of the way they'd be able to have much more
fun. The children play on the secret fears of the crew to make them
imagine things that aren't there (e.g.: Sulu sees knives coming at the
screen and refuses to change course.) Kirk eventually convinces the brats
that they miss their parents by showing them visual recordings of them
playing on the planet.
FACTS
Kirk beams two red shirts into space, thinking they are still in orbit
around the planet.