When the Moon comes to a halt near an abandoned planet, Koenig sends a team to the surface, where they make a shocking discovery about the origin of mankind. S1 Ep23
When the Moon comes to a halt near an abandoned planet, Koenig sends a team to the surface, where they make a shocking discovery about the origin of mankind. S1 Ep23
An Alphan botanist's attempts to telepathically communicate with his plants to increase the food supply goes terribly wrong when his experiments unleash a murderous force. S1 Ep22
An Alphan botanist's attempts to telepathically communicate with his plants to increase the food supply goes terribly wrong when his experiments unleash a murderous force. S1 Ep22
When an Eagle and its crew are destroyed by a seemingly invisible force, the Alphans discover that they are headed directly towards a huge alien energy field. S1 Ep21
When an Eagle and its crew are destroyed by a seemingly invisible force, the Alphans discover that they are headed directly towards a huge alien energy field. S1 Ep21
When Koenig crashes onto a highly advanced alien planet, he is captured by a resident scientist who wants to study him and must use his wits to make it out unscathed. S1 Ep20
When Koenig crashes onto a highly advanced alien planet, he is captured by a resident scientist who wants to study him and must use his wits to make it out unscathed. S1 Ep20
After a member of the crew is possessed by a mysterious and fatal influence, the Alphans find themselves targeted by a powerful alien spacecraft in search of information. S1 Ep19
After a member of the crew is possessed by a mysterious and fatal influence, the Alphans find themselves targeted by a powerful alien spacecraft in search of information. S1 Ep19
The Alphans encounter a craft looking for supplies, but soon discover that the sentient ship wants to imprison Helena, Bergman and Koenig to replace its dying creator. S1 Ep18
The Alphans encounter a craft looking for supplies, but soon discover that the sentient ship wants to imprison Helena, Bergman and Koenig to replace its dying creator. S1 Ep18
The past and future collide when the Alphans come across a space-time anomaly that leads to the creation of a duplicate moon - and a second, deserted Moonbase Alpha. S1 Ep17
The past and future collide when the Alphans come across a space-time anomaly that leads to the creation of a duplicate moon - and a second, deserted Moonbase Alpha. S1 Ep17
The Alphans face the prospect of a normal life when alien devices land on the lunar surface and emit oxygen, turning the Moon into an atmosphere-rich world with blue skies and a sun. S1 Ep16
The Alphans face the prospect of a normal life when alien devices land on the lunar surface and emit oxygen, turning the Moon into an atmosphere-rich world with blue skies and a sun. S1 Ep16
Koenig and a team of Alphans arrive on a planet, where a strange time warp leads to the crew discovering primitive versions of themselves from the Stone Age, over 40,000 years ago. S1 Ep15
Koenig and a team of Alphans arrive on a planet, where a strange time warp leads to the crew discovering primitive versions of themselves from the Stone Age, over 40,000 years ago. S1 Ep15
Representatives from a dying planet on a spaceship programmed to head to Earth meet members of the Moonbase Alpha crew, and offer some of them a chance to return home. S1 Ep14
Representatives from a dying planet on a spaceship programmed to head to Earth meet members of the Moonbase Alpha crew, and offer some of them a chance to return home. S1 Ep14
An astronaut seemingly returns from the dead and directs the crew toward a planet resembling Earth - but the promised idyll soon proves fraught with danger. S1 Ep13
An astronaut seemingly returns from the dead and directs the crew toward a planet resembling Earth - but the promised idyll soon proves fraught with danger. S1 Ep13
The crew rescue an alien trapped on an asteroid, only to discover that he is a dangerous and immortal psychopath addicted to inflicting pain and fear. S1 Ep12
The crew rescue an alien trapped on an asteroid, only to discover that he is a dangerous and immortal psychopath addicted to inflicting pain and fear. S1 Ep12
The Alphans head to a nearby planet after scans indicate it's the perfect world they're looking for, but on arrival Koenig discovers that it is lifeless - apart from one woman. S1 Ep11
The Alphans head to a nearby planet after scans indicate it's the perfect world they're looking for, but on arrival Koenig discovers that it is lifeless - apart from one woman. S1 Ep11
With the Moon on a collision course with a deadly, all-devouring 'black sun' and the fate of the crew hanging in the balance, Koenig launches a desperate escape bid. S1 Ep10
Moonbase is attacked by hostile aliens who demand that the Alphans hand Maya over to them so they can harvest her brain to continue their immortal existence.
While surveying a planet, an Alphan goes seemingly mad, murders a crew member and escapes. As the others search for him, the atmosphere changes and all their food becomes toxic.
Koenig responds to a distress call from a planet, only to discover that human life there has been eradicated. After crash-landing on a nearby moon, he is incarcerated in a penal colony.
An alien ship carrying a dangerous prisoner makes an emergency landing on Moonbase Alpha, but when Maya meets him, she becomes convinced he is innocent.
After surviving an attempt on his life, Koenig tries to convince the others that their visitors are hostile aliens who intend to destroy Moonbase Alpha.
The Alphans encounter a ship with friends from Earth, but an unconscious Koenig wakes up to realise only he can see what they really are: telepathic aliens.
When mysterious cosmic waves permeate Moonbase Alpha, many of the crew find themselves exhibiting psychic abilities, while a guilt-ridden Koenig is haunted by visions from his past.
The Alphans are struck by a strange illness after a cloud of space dust drifts over the base, and Maya must use her metamorphic abilities to beat a seemingly invisible creature hidden in it.
An Alphan botanist on an exploratory mission agrees to help a disembodied alien save his race from extinction, not realising the impact it will have on the crew.
The crew have their hands full when Moonbase Alpha is sucked into a space warp, while Maya is struck with a fever that causes her to transform into a series of unmanageable creatures.
An Alphan miner in search of titanium for his wife's new heart in the catacombs below the Moon begins to have prophetic visions of Alpha being consumed by a fireball.
After Moonbase is hit by a series of destructive waves from a nearby planet, Koenig, Carter and Maya head there to investigate - and discover a strange civilisation.
While exploring an asteroid that seems to be draining power from Moonbase, Koenig is trapped and replaced with a double, whose orders don't appear to benefit the Alphans.
When Moonbase is visited by the intergalactic merchant Taybor, Koenig realises that his ship would allow the Alphans to return to Earth, but Taybor asks for a very high price.
Koenig and Maya find themselves charged with murder when they pick some flowers and fruit while stranded on Luton, not realising that the planet is governed by its vegetation.
The Alphans unearth a cryogenic pod with a man and boy who claim to have been trapped there by members of their crew after a rebellion, however the truth is far more sinister.
An imposing and charismatic figure arrives on board claiming to be the creator of all life and chooses two couples from Moonbase to populate a nearby planet resembling Eden.
The Alphans encounter a spacecraft run entirely by a friendly robot after the crew died on a nearby planet, but Koenig and the others soon discover that he's hiding something.
An alien woman appears on Moonbase and insists that Tony and Helena return to her home planet with her, where the Alphans discover she has disturbing plans for the native inhabitants.
The Alphans receive a transmission from a scientist in Texas City about a transporter that will allow them to return home, but a glitch leads to a very unexpected destination.
The Alphans find capsules with people in suspended animation who claim to be victims exiled after an invasion and ask for help recovering their planet - but all is not what it seems.