#1 - Another Time, Another Place 8.04
Season 1 - Episode 16
The people of Alpha are faced with a very strange phenomenon as they find themselves copied and encounter their future selves on Earth. The unspoken question is how long will this last and what does it mean for the Alphans..?
#2 - Death's Other Dominion 8.03
Season 1 - Episode 5
Commander Koenig and his colleagues speed through space and time into a chilling world of ice. However, once there, they encounter people who appear to be former inhabitants of earth stranded there when their expedition crashed on the planet they call Ultima Thule.
#3 - The Last Sunset 8.01
Season 1 - Episode 20
When the moon approaches a possibly habitable planet, probes launched from the planet miraculously give the moon full gravity and atmosphere. However, the new gifts also have a dark side, causing Eagle crashes and making Paul delusional.
#4 - Voyager's Return 8.01
Season 1 - Episode 6
Grim danger emerges from the past as Alpha is threatened with destruction from an unmanned spacecraft. The ship was sent up from Earth many years earlier with tragedy in its wake. If this threat wasn't enough, victims from outer space threaten revenge.
#5 - Space Brain 7.89
Season 1 - Episode 21
The Alphans encounter an intangible mass as the moon heads though space and it could spell disaster for them. The energy field seems to have a strange and frightening power that Koenig and the others try to figure out before it's too late.
#6 - The Metamorph 7.88
Season 2 - Episode 1
Alpha needs titanium to repair its life support system and traces of it are located on the planet Psychon that is near to the moon. However, Koenig and the others soon learn of a sinister mining operation operating beneath Psychon's surface and what it may spell for the Alphans.
#7 - The Testament of Arkadia 7.86
Season 1 - Episode 23
In distant outer space, the Moon's random careening comes to a sudden halt as the Alphans discover what looks to be origins of life on Earth itself. Could this discovery spell the end of the Moon or the beginning of a new life for the Alphans?
#8 - The Bringers of Wonder (1) 7.85
Season 2 - Episode 18
A faster-than-light Super Swift ship arrives at Alpha, bringing friends and relatives and raising hopes that they will all be able to go home soon. But Koenig, recuperating from a brain injury, sees only hideous aliens in the visitors.
#9 - Guardian of Piri 7.84
Season 1 - Episode 11
A mysterious power from an alien planet takes control of Alpha with the intent of luring its inhabitants to a paradise of eternal peace but also a place of living death. Commander Koenig is the only one capable of saving the Alphans from a terrible fate.
#10 - Dragon's Domain 7.81
Season 1 - Episode 8
The Alphans encounter an eerie graveyard of lost spaceships that may be the result of encounters with a deadly monster in outer space. Is the threat real or imagined? Koenig must determine the truth before it may be too late....
#11 - The Beta Cloud 7.79
Season 2 - Episode 16
An Eagle sent to probe a cloud responsible for a mysterious illness infecting most of Alpha returns with a menacing creature determined to take the life support core of Alpha. Can Tony stop the menace before it's too late?
#12 - Force of Life 7.78
Season 1 - Episode 2
A terrifying force from Outer Space brings freezing death to Alpha personnel. One man has been chosen as the instrument of destruction.
#13 - Matter of Life and Death 7.77
Season 1 - Episode 13
Dr. Russell's long-lost husband, Lee, appears on an Eagle returning from an Earth-like planet. He warns that the planet is not for them and that a power greater than they can understand will destroy them if they go there. Koenig must decide whether to listen to Lee's warning or evacuate the Moon before it's too late.
#14 - End of Eternity 7.76
Season 1 - Episode 12
A terrifying power is unknowingly freed by the Alphans when they free a killer that seemingly can't be killed. How can Koenig and the others stop a psychopath that is virtually immortal?
#15 - The Exiles 7.75
Season 2 - Episode 2
A large group of objects suddenly appear in orbit around the moon and when one is retrieved by an Eagle sent to investigate, it found to contain the cryogenically frozen body of a young man. The man pleads for the Alphans to help revive his frozen colleagues though his pleas may not reveal all of his future plans.
#16 - Dorzak 7.75
Season 2 - Episode 21
An alien space ship approaches Alpha asking for emergency assistance upon contact. They discover that they are a prison transport ship carrying a prisoner called Dorzak to life in prison on an asteroid. However, Maya knew Dorzak and claims he is a poet and not a mass murderer and releases him.
#17 - Breakaway 7.75
Season 1 - Episode 1
Suspected radiation from nuclear waste containers threatens a deep space probe from Earth's space research center on the moon. It is a prologue to disaster and mankind's most fantastic adventure.
#18 - War Games 7.74
Season 1 - Episode 4
Moonbase Alpha finds itself at war with an unnamed planet. The outcome is disastrous. Everything is wrecked. But can there be a future for the survivors on the aggressor planet?
#19 - Alpha Child 7.73
Season 1 - Episode 7
The first baby is born on the moon and brings great joy for the first time in a long while to theAlphans. However, terrifying events follow with an outer space battle between spaceships that could decide the fates of hundreds.
#20 - The Last Enemy 7.73
Season 1 - Episode 24
In a solar system where two hostile planets are always on opposite sides of their sun, one planet uses the wandering Moon as a gun platform, putting Alpha in the middle of a never-ending war.
#21 - The Infernal Machine 7.73
Season 1 - Episode 17
The people of moonbase Alpha encounter something that is unlike anything they have encountered before:a machine that is alive and sentinent.
#22 - Ring Around the Moon 7.72
Season 1 - Episode 18
The moon itself somehow becomes the prisoner of an alien planet as Alpha is gripped in a ring of light. At the same time, Dr. Russell becomes an involuntary informer with death as her only alternative.
#23 - The Lambda Factor 7.71
Season 2 - Episode 17
A strange space cloud appears in the vicinty of Alpha around the same time as a technician dies under mysterious circumstances. Before long, Koenig is locked in a battle of wills with a woman whose latent mental abilities have surfaced presumably due to the cloud's proximity.
#24 - The Mark of Archanon 7.69
Season 2 - Episode 7
A survey below the moon's surface reveals a stasis chamber that the Alphans were unaware of. The chamber is found to contain two aliens, a man and a boy, in suspended animation. Once revived, the man identifies himself as Petrec and the boy Etrec and says they are emissaries from the planet Archanon. As Etrec is befriended, Helen discovers the two have a shared genetic disorder that may spell doom for everyone at the moonbase.
#25 - Mission of the Darians 7.69
Season 1 - Episode 9
A call for help reaches Moonbase Alpha from the survivors of a dying world. The world is one that has been flying through space for 900 years with contrasting inhabitants. Some have never changed while others have reverted to barbarism. Does this new planet represent hope to the Alphans or something potentially dangerous?