Many Psychons were scattered into space when their homeworld went into rapid environmental decline (the cause was not explained in canon). At least two of the species stayed behind to attempt to revive the planet, using a biological computer called Psyche that stole mental energy from alien victims to restore it to the way it was. This ultimately unraveled with the arrival of the inhabitants of Moonbase Alpha, and the entire planet exploded and was totally destroyed. One of the Psychons, Maya, was rescued and became a member of the Alphans.