Following the mind-staggering nuclear explosion which has sent the moon and its research station, Alpha, deep into space, Commander Koenig and his dedicated group of scientists have kept the base going and survived crisis after crisis.

Now a huge, mysterious object crashes into the moon a few miles from the research base. A search party goes out to investigate and almost at once there starts a series of terrifying adventures which look like putting an end to the moon base's incredible odyssey.

THE SPACE DEMONS

The fantastic intergalactic odyssey of the courageous men and women of Moonbase Alpha comes to a terrifying climax when the space wanderers confront the ultimate alien world.

A silent planet of never-ending night, its smooth, mysterious surface is thick with an ancient space dust.

And buried under the cloak of darkness are innocent-looking pods. Are they the seeds of new hope for Alpha, or of an incredible nightmare no one has ever before dared to imagine?

As Moonbase Alpha hurtles through space, an unrelenting chain of events threatens its very existence...

A rogue asteroid on course toward certain collision, a deadly plague decimating the crew with systematic precision, and the hypnotic presence of a mysterious famale creature — was there a hidden connection and would Commander John Koenig, Doctor Helena Russell and Professor Victor Bergman discover the secret in time to thwart eminent destruction?