The wandering Moon comes to the planet Psychon, where the leader Mentor lures the Alphans down.

The wandering Moon encounters a group of exiled aliens in suspended animation.

A transportation experiment from Alpha to Earth in 2120 goes awry, trapping Koenig, Helena, and Alan in Earth's past.

Helen and Tony are abducted by androids hoping to learn from them how to commit violence, so they can kill the humans that they were once created for.

Koenig and Russell are taken hostage by a demented AI from Earth.

An alien Magus claims to be God, and abducts Koenig and Maya, and Helena and Tony, to a planet it has created so that they can breed.

Alan finds father-and-son aliens in hibernation in a lunar tunnel, who have a viral "killing sickness".

Koenig and Maya land on a planet where the alien plant rulers put them through trial by combat after they inadvertently kill some of the local plant life.

A team of Alphans are trapped on a planet, held prisoner by a sentient rock.

A deceitful intergalactic alien trader arrives on Alpha, and has eyes on Maya.

An alien race abducts Koenig and sends a duplicate back with orders to drain Alpha's energy for them.

John, Alan, and Maya travel to a nearby planet to stop its explosive barrier, which threatens Alpha.

Alpha is plagued by a heat wave from space, while a fanatical engineer has visions to save his dying wife.

Koenig and Verdeschi are separated from Alpha when they're off on an Eagle and the Moon sucked into a space warp. A feverish Maya is stricken with a fever that causes her to transform into alien forms.

A teenage Alphan is tricked by an anti-matter specter to help bring the rest of his people across to a nearby planet.

A sentient cloud sends an illness to incapacitate most of the Alphans and a creature to take the base's life support core.

Lambda waves from a mysterious space phenomena enhance the ESP abilities of three Alphans. unleashing a wave of terror.

A rescue team from Earth arrives on Alpha. Upon awakening from a brief coma, everyone on the rescue term appears to Koenig to be hideous monsters.

Koenig convinces Helena and Maya that their supposed rescuers from Earth are really hostile aliens who want a nuclear explosion on Moonbase Alpha.

Some space surface exploration team members and their fanatical leader start chanting for a planet that will cause the Moon to pass through a nebula deadly to those living at Moonbase Alpha.

When a ship carrying a prisoner lands at Moonbase Alpha after asking for assistance, Maya insists that the prisoner is a poet and not a murderer and releases him.

After investigating a planet where all humanoid life had been eradicated, Koenig becomes trapped in a prison on one of the moons where no one knows that their planet has been wiped out.

An Alphan survey team lands on an Earth-like planet, but the vegetation turns poisonous, the Alphans' metal equipment starts to corrode, and an alien presence kills anyone who looks upon it.

The Dorcans demand that Moonbase Alpha hand over Maya so that the use of her brain stem can continue their immortal existence.