When the Mysterons threaten to destroy key links in the Frost Line Outer Space Defence System, Scarlet and Green investigate the mysterious deaths of the personnel at Red Deer Base.
Did You Know?
This is the voice of the Mysterons. We know that you can hear us Earthmen. Our next strike is imminent. We will show you how weak you really are. Within the next four hours, we will destroy key links in your Frost Line Outer Space Defense System. We will be avenged.