# List of Space: 1999 episodes

Space: 1999, a British science-fiction television series, ran for 48 episodes broadcast between 1975 and 1977. The first series (or season, often referred to as Year One) of 24 episodes began transmission in 1975, though production of the first episode began in 1973. In addition, a number of compilation films have been produced using material from multiple episodes, some containing additional footage. A brief, semi-official series denouement was filmed for exhibition at the Breakaway 1999 fan convention, held in Los Angeles, California in September 1999.

## Overview

Individual episodes are intended to be broadcast in a progressive order so that, for Year One, "Breakaway" should be broadcast first, with "Black Sun" and "Earthbound" being broadcast at an early stage to present the Moon entering a new and different part of space and the Alphans encountering their first aliens. However, many stations in the United States aired "Dragon's Domain" (production number 23) as the second instalment after "Breakaway" in September 1975. In the United Kingdom, "Force of Life" (production number 9) was the follow-up to "Breakaway". The other guidelines are that the episodes should progress to show John Koenig's and Helena Russell's relationship develop and blossom. "The Metamorph" should be the first episode of Year Two, followed by the remaining episodes (there is a two-part episode in Year Two) in the order that the days on Russell's status report (which begins each episode) dictates. Regional and national stations aired the series in a wide range of orders. In some cases, this included mixing Year One and Year Two episodes at random.
Original episode air dates below reflect the order of Space: 1999 as broadcast first, in Australia and the UK. The air dates dates given below are those for the UK.

## Series 1 (1975–1976)
### Episodes

| No. overall | No. in series | Title | Directed by | Written by | Original air date | Prod. code |
| 1 | 1 | "Breakaway" | Lee H. Katzin | George Bellak | 4 September 1975 (1975-09-04) | 1 |
| In September 1999, John Koenig reports to Earth's Space Research Center at Moonbase Alpha as its new commander. A strange sickness is killing some of the Moonbase Alpha crew. Commander Koenig's investigation reveals that the source lies at Nuclear Waste Disposal Area 1 caused by excessive magnetic energy fields. The continuous buildup of energy shortly causes massive explosion clusters that knock the moon off orbit into deep space. |||||||
| 2 | 2 | "Force of Life" | David Tomblin | Johnny Byrne | 11 September 1975 (1975-09-11) | 9 |
| The body of Anton Zoref is invaded by an unknown life force. The man soon manifests an uncontrollable ability to absorb energy. As the Alphans struggle to understand this mysterious force, Zoref's need becomes insatiable. Driven by instinct, he makes his way to the greatest source of energy on Alpha: the Nuclear Generating Plant. |||||||
| 3 | 3 | "Collision Course" | Ray Austin | Anthony Terpiloff | 18 September 1975 (1975-09-18) | 13 |
| The Moon is on a collision course with an enormous planet. On a scouting mission, Koenig encounters Arra, the Queen of Atheria. The aged monarch proclaims the collision is a preordained event and must occur for her people to evolve to a higher plane of existence. Now Koenig must convince his crew to have faith and do nothing in the face of apparent destruction. |||||||
| 4 | 4 | "War Games" | Charles Crichton | Christopher Penfold | 25 September 1975 (1975-09-25) | 17 |
| Approaching an inhabited planet, the Alphans are suddenly pounced upon by warships. In an unprovoked attack, Moonbase Alpha is devastated by Earth-style Hawk fighters. With 128 dead and Alpha unable to sustain life, Koenig and Helena appeal to the aliens for mercy. The aliens proclaim the Alphans to be an invading virus, with no right to exist. |||||||
| 5 | 5 | "Death's Other Dominion" | Charles Crichton | Anthony Terpiloff, Elizabeth Barrows | 2 October 1975 (1975-10-02) | 14 |
| On a frozen planet, the Alphans encounter shipwrecked humans from a lost expedition. The expatriates from Earth enjoy an idyllic existence: they have been made immortal and have lived there for over 880 years. They invite the Alphans to join them in paradise, but dissidents reveal all is not as it seems, teaching Koenig that immortality comes with a price. |||||||
| 6 | 6 | "Voyager's Return" | Bob Kellett | Johnny Byrne | 9 October 1975 (1975-10-09) | 12 |
| The automated Earth space probe Voyager One is approaching the Moon. With the radioactive exhaust from its engine certain to extinguish all life on Moonbase, the Alphans try to gain control and shut down the drive. Help comes when the probe's designer is found living on Alpha under an assumed name. However, Voyager is being followed by alien ships seeking revenge. |||||||
| 7 | 7 | "Alpha Child" | Ray Austin | Christopher Penfold | 16 October 1975 (1975-10-16) | 10 |
| The Alphans celebrate the arrival of the first child born on the Moon. The blessed event sours when the infant grows into a five-year-old child in minutes. Trying to accept him, the Alphans do not notice that little Jackie Crawford is much more than he seems. When hostile spaceships approach the base, Koenig realises, too late, that the aliens have an agent on Alpha. |||||||
| 8 | 8 | "Dragon's Domain" | Charles Crichton | Christopher Penfold | 23 October 1975 (1975-10-23) | 23 |
| In 1996, Tony Cellini commanded a high-profile space mission which ended in disaster. The sole survivor, he told an outrageous tale of a spaceship graveyard and an alien 'dragon' which devoured his crew. Believed by no one, he was left a broken man. Five years later, the truth is revealed when the runaway Moon approaches the same deadly Sargasso in space. |||||||
| 9 | 9 | "Mission of the Darians" | Ray Austin | Johnny Byrne | 30 October 1975 (1975-10-30) | 22 |
| Encountering a derelict spaceship, the Alphans respond to an automated distress signal. On board, they discover what remains of the once-great civilisation of Daria: an elite group which maintains control of the ship and a tribe which has descended into savagery. The Alphans are appalled when they discover what measures the Darians have taken to survive. |||||||
| 10 | 10 | "Black Sun" | Lee H. Katzin | David Weir | 6 November 1975 (1975-11-06) | 3 |
| The travelling Moon drifts within range of a black sun. Pulled toward certain destruction by its inescapable gravitational force, the Alphans employ desperate measures to stay alive. As a lifeboat Eagle carries six persons to safety, the Moon plunges into the black sun, with only an experimental forcefield protecting Alpha. |||||||
| 11 | 11 | "Guardian of Piri" | Charles Crichton | Christopher Penfold | 13 November 1975 (1975-11-13) | 8 |
| Strange events befuddle the Alphans as they approach the planet Piri. When exploring its lifeless surface, Koenig encounters the seductive servant of the mysterious Guardian of Piri. She offers the wayward Alphans a life of peace and perfection. Realising the deadly truth behind the peace of Piri, Koenig struggles to free his people from the Guardian's influence. |||||||
| 12 | 12 | "End of Eternity" | Ray Austin | Johnny Byrne | 20 November 1975 (1975-11-20) | 16 |
| While exploring an asteroid, the Alphans critically injure an alien trapped within. Bringing him to Alpha, he is declared dead. However, he recovers spontaneously and his wounds have completely healed. The indestructible Balor is a scientist whose people had discovered the secret of immortality. He explains that his people branded him a dissident as their society descended into malaise brought about by widespread deathlessness. He was imprisoned inside the asteroid and cast out. Actually Balor is a psychopath, offering a drastic solution to his people's apathy; now freed of the eternal prison, he plans to spend eternity practising the art of pain and torture, with the Alphans as his subjects. |||||||
| 13 | 13 | "Matter of Life and Death" | Charles Crichton | Art Wallace, Johnny Byrne | 27 November 1975 (1975-11-27) | 2 |
| A lush Earth-type planet holds the promise of a new home for the people of Moonbase Alpha. When the reconnaissance Eagle returns, it carries an unexpected passenger: Helena's husband, who died five years ago. The mysterious Lee Russell tells the Alphans that death awaits them on the new planet. The Alphans ignore his warning and unknowingly descend into a world of antimatter. |||||||
| 14 | 14 | "Earthbound" | Charles Crichton | Anthony Terpiloff | 4 December 1975 (1975-12-04) | 5 |
| An alien spacecraft crashlands on the Moon, its passengers refugees from a dying world. As their destination is Earth, they generously offer to take one person with them when they depart. The scheming Commissioner Simmonds takes steps to ensure that he is the lucky individual chosen, even if it means destroying Alpha. |||||||
| 15 | 15 | "The Full Circle" | Bob Kellett | Jesse Lasky Jnr., Pat Silver | 11 December 1975 (1975-12-11) | 15 |
| When exploring a habitable planet, members of the Alphan survey party vanish without a trace. Are they the victims of an indigenous tribe of Stone Age humanoids? The mystery deepens when a dead caveman is found to have capped teeth. Others soon notice the primitive cave chief and his mate bear an uncanny resemblance to the missing John Koenig and Helena Russell. |||||||
| 16 | 16 | "Another Time, Another Place" | David Tomblin | Johnny Byrne | 18 December 1975 (1975-12-18) | 6 |
| After an encounter with a space-time anomaly, the Alphans find their Moon back in the Solar System on a course to re-enter Earth orbit. The celebration ends when it becomes apparent Earth is an inhospitable wasteland. The mystery deepens when they discover a duplicate Moon already in orbit and a duplicate Moonbase Alpha lying empty and deserted. |||||||
| 17 | 17 | "The Last Sunset" | Charles Crichton | Christopher Penfold | 1 January 1976 (1976-01-01) | 11 |
| Anonymous alien benefactors provide the wandering Moon with a breathable atmosphere. The Alphans rejoice as they realise they have a wonderful new home in their own backyard. Preparations are made to settle and begin building a new civilisation on the Moon's surface. Koenig is suspicious of the aliens' motives, wondering how long this generous gift will last. |||||||
| 18 | 18 | "The Infernal Machine" | David Tomblin | Anthony Terpiloff, Elizabeth Barrows | 8 January 1976 (1976-01-08) | 21 |
| The Alphans are visited by a bizarre spacecraft, whose request for supplies hides a deeper purpose. The ship, Gwent, is found to be sentient, the attempt of a vain alien genius to live forever. Powerful, unstable and craving companionship, Gwent intends for Koenig, Helena and Bergman to replace its aged, dying creator. |||||||
| 19 | 19 | "Ring Around the Moon" | Ray Austin | Edward di Lorenzo | 15 January 1976 (1976-01-15) | 4 |
| A technician falls under an alien influence, accessing classified information before mysteriously dying. Soon after, the Moon is stopped in space by the powerful rays of an alien spacecraft. The aliens' only interest in Alpha is the data held in its computers, information they now plan to obtain through the possessed eyes of their next agent: Helena Russell. |||||||
| 20 | 20 | "Missing Link" | Ray Austin | Edward di Lorenzo | 22 January 1976 (1976-01-22) | 7 |
| John Koenig finds himself trapped on the planet Zenno, in the home of an alien scientist and his daughter. Advanced two million years beyond Earth’s people, the aliens consider Koenig their missing link. Faced with the threat of being treated like an experimental animal for the rest of his life, Koenig uses an unexpected weapon to confound his captor: love. |||||||
| 21 | 21 | "Space Brain" | Charles Crichton | Christopher Penfold | 29 January 1976 (1976-01-29) | 20 |
| An Eagle and its crew are crushed to death by an enormous energy field in space. When one of Alpha's astronauts is possessed by the anomaly, he tells them the energy field is a living space brain, which responded to the 'threat' with antibodies. Finding the Moon on a collision course with the Brain, the Alphans make plans to avoid the same fate as the Eagle. (This episode is notable for the inclusion of music from the first movement (Mars, the bringer of war) of the suite The Planets by Gustav Holst). |||||||
| 22 | 22 | "The Troubled Spirit" | Ray Austin | Johnny Byrne | 5 February 1976 (1976-02-05) | 19 |
| Dan Mateo, hoping to unlock the secret of communication with plants, unleashes a killing force from the depths of his own mind. This macabre spectre seeks vengeance for Mateo's horrible death—which has not yet occurred. Bridging the span between science and the supernatural, the Alphans hope to break the cycle and exorcise the ghost without killing the man. |||||||
| 23 | 23 | "The Testament of Arkadia" | David Tomblin | Johnny Byrne | 12 February 1976 (1976-02-12) | 24 |
| The wandering Moon suddenly changes course and comes to a halt in the vicinity of a dead world. As Alpha's power fails, the only hope for survival is to evacuate to the planet, which was ravaged by a nuclear war in the distant past. Searching for answers, a team is sent to the surface, where they discover the shocking truth of the origin of the human species. |||||||
| 24 | 24 | "The Last Enemy" | Bob Kellett | Bob Kellett | 19 February 1976 (1976-02-19) | 18 |
| The Moon approaches a solar system with two planets on opposite sides of its sun. The Alphans are trapped in an interplanetary conflict when warships from both worlds trespass on the Moon to fire missiles at their opponents' planets. After taking in a refugee from a destroyed gunship, the Alphans discover they have drifted into the middle of a literal war of the sexes. |||||||