Space: 1999

John Koenig assumes command of Moonbase Alpha in September 1999, only to discover that a mysterious illness is affecting the crew. His investigation leads him to Nuclear Waste Disposal Area 1, where excessive magnetic energy fields are identified as the cause. As the energy builds, it triggers a series of explosions that propel the Moon into deep space.

Anton Zoref is taken over by an unknown energy force that gives him the power to absorb energy, which quickly becomes uncontrollable. As the Alphans try to understand the phenomenon, Zoref is drawn to the Nuclear Generating Plant, the largest energy source on Alpha.

The Moon is heading toward a catastrophic collision with a massive planet, and Commander Koenig meets Arra, the elderly queen of Atheria, during an exploration mission. Arra claims the collision is a necessary, divinely ordained event that will enable her people to advance to a higher state of existence. Koenig faces the challenge of persuading his crew to trust in this prophecy and refrain from intervening, despite the apparent danger.

As Moonbase Alpha approaches a habitable planet, it is ambushed by alien warships in a surprise attack. The base is heavily damaged by Earth-style Hawk fighters, resulting in 128 deaths and critical life-support failures. Commanders Koenig and Helena plead with the aliens for mercy, but the aliens view the Earthmen as an invasive threat and refuse to show compassion.

While exploring a frozen planet, the Alphans discover a group of humans from a lost Earth expedition who have lived for over 880 years due to a mysterious immortality. Though the expatriates appear to live in paradise, dissenting members reveal hidden dangers, forcing Commander Koenig to question the true cost of eternal life.

The Alphans attempt to stop the Voyager One probe from destroying Moonbase with its radioactive engine emissions, aided by the probe's designer, who is living incognito on the station. As they work to shut down the probe, they discover it is being pursued by alien vessels seeking retribution.

The Alphans rejoice as the first child is born on the Moon, but their joy turns to concern when the infant rapidly ages to a five-year-old. As they struggle to adjust to the boy's presence, the Alphans fail to recognize that Jackie Crawford is not what he appears to be. When alien ships threaten Alpha, Commander Koenig realizes too late that the boy is an alien agent.

In 1996, astronaut Tony Cellini survives a catastrophic space mission, claiming his crew was killed by an alien entity in a derelict spacecraft graveyard, but his story is dismissed. Five years later, as the Moon drifts toward the same mysterious region, the possibility of his account being true resurfaces.

The Alphans answer a distress signal from a derelict spaceship and encounter the remnants of the advanced Darian civilization, now divided between a ruling elite and a savage tribe. They are shocked by the extreme methods the Darians have employed to ensure their survival.

The Moon drifts toward a black sun, and the Alphans struggle to survive as its gravity threatens to destroy them. A lifeboat Eagle carries six people to safety while an experimental forcefield shields Alpha as the Moon is consumed by the black sun.

As the Alphans near the desolate planet Piri, they experience unexplained phenomena. During an exploration, Koenig meets a captivating servant of Piri's enigmatic Guardian, who promises an idyllic existence. Koenig must then uncover the peril hidden beneath the Guardian's offer and rescue his crew from its grasp.

While investigating an asteroid, the Alphans encounter and injure an alien who is later revealed to be Balor, a being with the power of complete regeneration. Once brought to Alpha, Balor, a scientist from a race that achieved immortality, reveals a twisted agenda to use his endless life to perfect the infliction of pain and suffering.

A lush, Earth-like planet appears to offer a new future for the Moonbase Alpha crew, but the return of a reconnaissance mission brings a shocking twist: the arrival of Lee Russell, presumed dead for five years. He warns the Alphans of impending doom, but his caution is dismissed, leading them into a perilous encounter with a world made of antimatter.

A damaged alien ship carrying refugees from a dying planet crash-lands on the Moon with Earth as its intended destination. The aliens offer to take one human with them, prompting the ambitious Commissioner Simmonds to pursue the opportunity at any cost, including risking the safety of the lunar colony Alpha.

A survey team disappears during an exploration of a seemingly habitable planet, raising concerns about the dangers posed by the indigenous Stone Age inhabitants. The mystery intensifies when a deceased caveman is discovered with capped teeth, and parallels emerge between the primitive tribe's leader and his mate and the missing Commander Koenig and Dr. Russell.

Following a bizarre space-time event, the Alphans are surprised to find themselves near Earth, which has become a lifeless planet. Their hopes are short-lived as they discover another Moonbase Alpha and a second Moon in orbit, both abandoned and unexplained.

Anonymous alien benefactors provide the Moon with a breathable atmosphere, prompting the Alphans to celebrate the possibility of establishing a new civilization on its surface. While preparations for settlement begin, Commander Koenig remains wary of the aliens' true intentions and the longevity of their unexpected gift.

A mysterious spacecraft, Gwent, arrives at Alpha Base seeking supplies, but its true purpose is revealed: it is a sentient vessel created by an arrogant alien genius seeking immortality. Unstable and longing for companionship, Gwent plans to have Koenig, Helena, and Bergman replace its dying creator.

A technician gains access to classified data under mysterious circumstances before dying, and shortly afterward, an alien spacecraft halts the Moon in space. The aliens, seeking information stored in Alpha's computers, prepare to use Helena Russell as their next agent.

John Koenig is stranded on the planet Zenno, where an advanced alien scientist and his daughter believe he is a missing evolutionary link. As they intend to study him, Koenig attempts to avoid becoming their subject through an unexpected and unconventional approach.

An Eagle crew is killed when they encounter a massive energy field in space. One Alpha astronaut becomes possessed and reveals the field is a sentient "space brain" that reacts to threats with defensive antibodies. The Alphans discover the Moon is heading toward the Brain and begin planning to avoid a similar fate.

Dan Mateo's attempt to communicate with plants inadvertently awakens a deadly supernatural force from his subconscious, a vengeful entity tied to a future tragedy. The Alphans work to resolve the conflict by separating the ghost from Mateo without harming him, blending scientific and mystical approaches.

The Moon abruptly alters its trajectory and stops near a desolate, irradiated planet that was devastated by a past nuclear war. With Earth's resources failing, the crew of Alpha considers evacuating to the planet, sending a team to investigate. The team uncovers a startling revelation about humanity's origins.

The Moon enters a solar system where two planets orbit on opposite sides of a shared sun, drawing the Alphans into a conflict as warships from both worlds use the Moon as a launching point to attack each other. A refugee from a destroyed gunship reveals the Alphans have become entangled in a larger interplanetary war with deep societal divisions.

An Eagle is sent onto the surface of the planet Psychon, which has titanium, needed for repairs to the Alpha Base. It fails to return and is used by Psychon scientist Mentor as a bait with which to entice other members of the Alphan crew onto the planet. Mentor is building a computer but it will be fuelled by the living brains of humans, and he has his eye on those of the Alphan crew. Fortunately his daughter, the shape-shifting Maya, does not share her father's views and is on the side of the Alphans.

With Maya now a crew member the Alphans discover a young couple called Cantor and Zova who have been in suspended animation for some while. They claim that they are exiles from the planet Golos, following an invasion, and ask for the help of Alphan crew members to restore the planet to them. Helena and Tony accompany them to the planet Golos, where it is apparent that they are not the young innocents they appeared to be.

A transmission from Dr. Logan in Texas City leads the Alphans to believe that they can finally land back on Earth, though they have travelled through time and, when they touch down in Texas City, they will be in the twenty-second century. However, due to a hitch, they find themselves in a barren and hostile environment. It is Scotland in the fourteenth century where the Scots are at war with the English invaders.

A sinister woman called Zamara materializes on the base, forcing Helena and Tony to accompany her to the planet of Vega, whose natives are anything but friendly. A servant of the Vegans, known only as Number Eight, informs the two Alphans that he and his race are the natural inhabitants of the planet and that Zamara and her race are androids, who, it turns out, want the Alphans to teach them warfare.

The Alphans encounter an eccentric and intelligent robot who is known as Brian the Brain. Brian's creator Captain Michael and his crew have all died in mysterious circumstances and Brian asks for the help of Koenig and his crew. However, it soon becomes very apparent that Brian is anything but harmless and was in fact responsible for the deaths of Captain Michael and his colleagues. And he is ready to do the same to the Alphans.

The tall and imposing Magus arrives on the base. He claims god-like powers, namely that he effected the Creation. But he is now disillusioned with the way that Life has progressed and wishes to start again. He plans to mate Helena and Tony and Maya with Koenig. But of course he is not God but a renegade cosmic sorcerer, and quite an illogical one at that, who needs to be controlled.

The latest extra-terrestials to be rescued by the Moon Alpha Base crew are Pasc and his young son Etrec. They are from the usually peaceful planet of Archaron and they claim that they are victims of a rebellion, engineered by Pasc's wife Lyra. However, Helena discovers that they have both been infected with a virus which makes them considerably less friendly and more deadly than their initial claim.

Whilst Koenig and Maya are exploring a planet called Luton,which is lush in vegetation, she picks a flower and he helps himself to some fruit. As a result they are put on trial for murder by three talking trees, the Judges of Luton. The trial is by combat and the pair must face three aliens, one with superstrength, one which can render itself invisible and one which can teleport.

The Alpha Moonbase needs a rare ore known as Milgonite, which is detected on an extremely dry planet. Koenig leads a small landing force and discovers a glowing rock formation which comes alive and cuts off the party's links with the base. It is a trap - the planet needs water to survive and has lured the travellers there for the water in their bodies.

The expansive Taybor, an inter-galactic merchant arrives from hyper-space on his ship the 'Emporium'. He is offering to sell things to the Alphans. Koenig realizes that if the Taybor sold them his space-ship, it would enable the Alphans to fly back to Earth, but the price the Taybor is asking for this transaction is Maya.

Whilst he is exploring an asteroid Koenig is taken over by an alien race known as the Kalthon, who replace him with an exact double. In consequence every action ordered by the fake Koenig is solely for the benefit of the Kalthon and to the detriment of the welfare of the Alphans. Helena realizes that something is wrong when 'Koenig' is cold to the touch and needs to convince the other crew members.

The Alphans land on a planet seemingly devoid of any human existence but being run by a group of machines. The machines explain to the visitors that their human overlords are in a state of regeneration but the chief machine, the Guardian,sees the Alphans as posing a threat and it is down to two newly regenerated females known as A and B to decide their fates.

Ship's engineer Patrick Osgood believes he can obtain titanium, to make a new heart for his sick wife Michelle, from the catacombs of the moon, using dynamite. The explosion which follows gives him a vision of the future in which the ship is pursued by a fireball and this comes true. Though Helena is making a new heart for Michelle, Osgood becomes impatient and drags his wife back into the catacombs, giving Koenig a double task - to avoid the fireball and save the Osgoods.

Koenig and Verdeschi are sucked into a space warp. A feverish Maya is stricken with a fever that causes her to transform into a repulsive space monster.

Several crew members explore the planet Sunin, including botanist Shermeen Williams, who appears to have visionary gifts. She links up with an alien, called Vindrus, who wants her help in transferring his body and that of his race, into solid matter, giving them proper human form so that they can join the universe as real matter. However, for every one of his race made flesh, an Alphan must lose their matter.

A strange cloud drifts over the base and causes most of the crew to be stricken with illness. A monster, the 'cloud creature' appears out of the cloud and runs amok on the base. A voice from the cloud explains its purpose. The base must give up its life support in order to prevent the cloud from dying. With most of the crew indisposed through illness, it is down to Maya to employ her shape-shifting skills to beat the creature.

A pretty, young Alpha technician dies a horrible and unexplained death. Dr. Russell's experiments reveal that one of the crew is possessed of paranormal mental powers and is trying to take control of Moonbase Alpha....

Everyone on Moonbase is electrified by the arrival of a spaceship from earth. Everyone, that is, except Commander Koenig. Where the others see long-lost friends and relatives, he sees hideous aliens, bent on taking over the Moonbase...

People from Earth have landed on Moonbase Alpha, promising to take the Alphans back home. Commander Koenig, however, sees not fellow human beings, but aliens, and tries to kill some of them. Horrified, Helena stuns him with a laser gun and later, as he lies unconscious in the Medical Center, Koenig is approached by one of the aliens (for that is what they really are) who tries to smother him...

Some subterranean miners start chanting for a planet that will cause the Moon to pass through a nebula deadly to those living at Moonbase Alpha.

A spaceship arrives on Moonbase Alpha carrying a prisoner, whom Maya is astonished to learn is Dorzak, a survivor from her planet, Psychon. But can he, a man of peace, really be guilty of the crimes of violence for which he is being exiled?

Answering a distress signal, Commander Koenig is forced to crash-land his Eagle on Entra - moon of the planet Ellna - which turns out to be the planet's penal colony, and Koenig finds himself a prisoner of the beautiful Elizia and her equally beautiful prison guards.

The arrival of the Alphans on another planet seems to cause a change in its atmosphere, setting off pollution and poisoning of the water. They meet Zoran, the sole survivor of the last exploratory force, who tells them that the planet is controlled by an immortal being - with whom Koenig must parley if he and his crew are to leave the planet alive.

The Dorcons -the most powerful race in the galaxy -demand that the Alphans hand Maya over to them. Koenig refuses, until Moonbase Alpha is savagely attacked and invaded! Then, having let them take Maya he makes a desperate attempt to save her....