This is probably the best DVD of the 12, featuring 4 excellent episodes (all from the first season). The Infernal Machine features Leo McKern as both Companion and the voice of Gwent, the ship/computer which arrives on the Moon searching for supplies and more companions.
The second episode features the Alphans attending to a distress call from a giant ship adrift in space. What they find there is something far more horrifying than mutated survivors of a nuclear blast. Joan Collins guests as one of the Darians.
The third episode, arguably the series' finest hour, is Dragon's Domain. It tells the story of one of the Alphan crew and his earlier, horrifying encounter with a creature which killed the crew of his exploration ship. No-one ever believed him but now as the Moon drifts near a spaceship graveyard the question arises as to how much truth there is in his story.
The fourth episode, entitled Testament of Arkadia consolidates the idea that their is a higher purpose involved in the Moon's odyssey. Nearing a planet, the Moon is brought to an abrupt halt. As their power is being drained it looks as if their only option is to try and settle on the planet. Initially finding it barren, the Alphans all but give up on the planet only to discover that it hides a great secret.
Four of the finest episodes, great picture quality and sound quality, this DVD also includes the writer's guide for the series. However, there is one flaw which spoils the DVD - the colour for Dragon's Domain is wrong. Everything that is meant to look yellow is orange. Such a shame, since all the other Carlton DVDs are close to perfect.