Terra Alpha

Terra Alpha was a planet ruled by Helen A. The planet had a yellow-purplish atmosphere. All those who lived there had a normal name, followed by a grading letter. Those who weren't from the planet were given "Sigma" as their grading.

On Terra Alpha everyone had to be happy. This was enforced by the Happiness Patrol. After the Happiness patrol was deposed it became a free colony. (TV: The Happiness Patrol)