Season One - 1975-1976
On September 9, 1999, John Koenig arrives at Moonbase Alpha to investigate the cause of
death of nine crewmen of Earth's latest space probe, and Alpha's Dr. Helena Russell
reports to him that the men died of brain damage that may have been caused by radiation
poisoning. The source of the radiation soon becomes evident when two nuclear waste dumps
on the far side of the Moon explode, propelling the Moon from Earth orbit and on a lonely
journey into uncharted space.
Matter of Life and Death
When a reconnaissance flight to the planet Terra Nova returns to Moonbase Alpha with an
extra passenger -- Dr. Helena Russell's long-lost husband -- Commander Koenig mounts an
exploratory mission to Terra Nova, ignoring Lee Russell's warnings about the planet.
Suddenly things begin to go wrong and most of the Alphans are killed; but Lee Russell
claims he can give Dr. Russell the power to return things to the way they were before
Terra Nova was found.
The Black Sun
The runaway Moon is drawn slowly toward its destruction in a black sun (black hole),
and in an effort to save Moonbase Alpha, Professor Bergman designs a force field that
draws its power from the collapsed star itself. In an Eagle craft sent out as a
"survival" ship, three couples from Alpha watch as the Moon travels through the
time-space warp caused by the black sun.
Ring Around the Moon
While a Moonbase Alpha engineer is repairing some equipment, an energy beam from an
alien probe strikes his head, leaving an implant in his brain. As a result, the engineer
becomes a remote robot controlled by the alien probe's computer; but when the engineer's
brain "burns out" from the energy of the implant, the alien computer abducts Dr.
Russell to place an implant in her brain, and the only way to save her is for Commander
Koenig to confront the alien face-to-face.
An alien spacecraft enroute to Earth crash lands on the Moon and its six crewmembers
are awaked from suspended animation by Moonbase Alpha personnel. In appreciation for
helping them, the aliens offer to allow one Alphan to accompany them to Earth once their
ship is repaired; but when Earth Commissioner uses trickery to get the ride back home, he
experiences the surprise of his life.
Another Time, Another Place
The Moon passes through a rift in the fabric of space and is hurtled across time and
space back to Earth at a point in time when the Moon is still in Earth orbit; and the
Alphans soon realize that their Moon and the Moon of the time they have entered are on a
collision course to destruction.
From the point of view of the Alphans, Commander Koenig is at the point of death after
the crash of an Eagle craft; but Koenig really finds himself alive and well on the planet
Zeno, where an anthropologist believes that Koenig is the missing link in the evolutionary
ascent of the planet's inhabitants.
The Guardian of Piri
Moonbase Alpha's computer comes under the control of the Guardian of Piri, an
incredibly beautiful woman who tells the Alphans that Piri is a paradise world; but as the
Alphans abandon the Moonbase and Commander Koenig, who does not believe the Guardian, they
soon find that the planet is not the paradise they thought it to be.
Force of Life
The body of a Moonbase Alpha technician is invaded by a life force that consumes raw
energy from equipment and other people, leaving a trail of lifeless bodies behind. The
Alphans set a trap for the entity by using the Alpha power station as the bait, but the
plan soon turns against them as the entity become more and more powerful as it enters the
station's reactor room.
The first child born on Moonbase Alpha since it left Earth orbit begins to grow at a
tremendous rate, reaching the age of five in just a new minutes; but when four alien ships
appear over Alpha, the boy dies and is replaced by a full-grown alien man who is the
leader of a group of 120 who are being pursued by authorities from their planet. The
aliens' plan is to hide in the bodies of the Alphans after the humans have been killed.
The Last Sunset
As the Moon encounters an Earth-like planet, the planet's benevolent inhabitants send
satellites to the Moon to adjust its gravity and atmosphere to Earth-normal; but when it
becomes obvious that the Moon will not be able to achieve orbit around the planet and that
the atmosphere will freeze and crush Moonbase Alpha under its weight, the aliens begin to
draw off the atmosphere from the Moon. They don't know, however, that Dr. Russell and
three other Alphans are on the lunar surface after having crashed in an Eagle.
Moonbase Alpha encounters Voyager One, a malfunctioning neutron-powered probe that had
been launched from Earth in 1985, and its engines must be switched to chemical rockets
before the neutron rockets' wake destroys Alpha; but Alpha soon comes under attack from
three ships from a vengeful alien race that was all but destroyed by Voyager One's neutron
rocket when it passed close to their planet.
Eagle pilot Alan Carter is almost killed in the explosion of an asteroid on a collision
course with Moonbase Alpha. When Commander Koenig goes to rescue him, he discovers that
Alpha is still on a collision course with a planet that was behind the asteroid; but Arra,
a mysterious woman from the planet, tries to convince Koenig that the inhabitants of her
planet and Alpha will survive and prosper as a result of the collision.
Death's Other Dominion
Moonbase Alpha receives a distress call from a planet with a surface temperature of
-200 degrees and, upon landing, the crew of a rescue Eagle find the survivors of a 1986
Earth expedition to Uranus, one of whom is Dr. Cabot Rowland, a scientist who claims to
have found the secret to immortality, but at what price?
A landing party to an alien planet fails to return, and when Moonbase Alpha commands
the Eagle to return by remote control, they find body of a caveman. Later, when they send
another Eagle to investigate, they discover that the original landing party has de-evolved
End of Eternity
An exploratory expedition from Moonbase Alpha finds a terribly mutilated alien named
Balor on a passing planet and bring him back to Alpha, where his wounds are quickly healed
and he reveals himself as a psychopath who takes pleasure in causing pain and destruction.
As the Moon passes a planet light years from Earth, Moonbase Alpha comes under attack
from Hawk Warships of a type made on Earth and is virtually destroyed, with many
casualties. Commander Koenig and Dr. Helena Russell fly to the Eagle to plea for help, but
Dr. Russell is captured. When he returns in a laser-equipped Eagle with Alan Carter to
attack the planet, Koenig is teleported back to Alpha, where, in a blind rage, he begins a
self-destruct sequence to destroy not only Alpha, but also the attacking planet.
The Last Enemy
As the Moon passes between two warring planets that are always on opposite sides of
their sun, the planets' inhabitants use the Moon as a base from which to mount attacks
against their opponents. While Commander Koenig attempts to negotiate a truce between the
two planets, their leaders conspire to get the upper hand in the conflict.
The Troubled Spirit
While attempting to communicate telepathically with plants, a botanist summons up a
ghost which begins to prowl Moonbase Alpha seeking revenge for a horrible death which has
not yet happened.
When alien hieroglyphics begin to appear on Moonbase Alpha's communications screen,
Commander Koenig sends an Eagle into a mysterious approaching light source; but it is
destroyed. A crewman of a second Eagle begins to act crazed, but is eventually able to
communicate to the Alphans that the light source is a non-aggressive being that is trying
to warn Alpha that it can't avoid a collision with the Moon. Koenig must then try to
disarm a nuclear device he had sent into the brain before its true intentions were known
and also stop the impending collision.
The Infernal Machine
A strange craft lands near Moonbase Alpha and its inhabitant, an old many who calls
himself "Companion" tells the Alphans that "Gwent" needs supplies.
But, when Commander Koenig, Dr. Russell, and Professor Bergman go aboard the craft, they
soon learn that "Companion" is near death and that "Gwent" is the
craft's computer, which wants someone to stay as "Companion's" replacement.
Mission of the Darians
Alpha answers a call from help from a 50-mile long space vessel known as Daria and find
that the most of the Daria's inhabitants have degenerated to a state of primeval
barbarism. The Darian "upper class" invite the Alphan to join them on they
journey to a new home planet, but the Alphans soon discover that the Darians want the
Alphans to supply one of their most primitive needs.
Tony Cellini, a close friend of Commander Koenig, begins to have nightmares about an
il-fated mission in 1996 that resulted in the gruesome death of most of the crew by a
tentacled monster they encountered. When his story isn't believed by Koenig and Dr.
Russell, Cellini steals an Eagle and flies off to face the monster once again.
The Testament of Arkadia
Suddenly and without warning, the Moon stops near a lifeless planet, and Commander
Koenig sends a landing party to explore. They soon discover, not only ancient human
remains, but inscriptions in a cave in the ancient Sanskrit language. Upon translating the
inscriptions, they learn that this planet, called Arkadia, was the birthplace of the human
race, which escaped a holocaust on the planet by colonizing Earth.