Ep 6. The Mark of Archanon

In the Space 1999 season 2 episode 6 titled "The Mark of Archanon," the Alphans come across an alien spacecraft that has crash-landed on a nearby planet. After investigating the wreckage, they discover a group of three Archanon scientists who were onboard, a highly evolved race with advanced technology and telekinetic abilities.

The Alphans offer to assist the Archanons in repairing their spacecraft, but quickly learn that the aliens are on a mission to collect and preserve the genetic material of all species in the universe before their eventual extinction. The Archanons are searching for a rare metal needed to power their DNA storage facility and the Alphans agree to help them find it.

As they journey through the planet's hostile environment, they encounter a primitive tribe of humanoid creatures who become convinced that the Archanons are gods. The Archanons use their telekinetic abilities to help the tribe, but their actions ultimately lead to a dangerous misunderstanding between them and the Alphans.

Meanwhile, Commander Koenig discovers that one of the Archanon scientists is dying and offers to help save her life. This causes friction with the other two Archanons who believe in their people's strict code of non-interference which prohibits them from helping other alien species.

As tensions rise, the Alphans and the Archanons must work together to find the rare metal before time runs out and the Archanon DNA storage facility fails. The episode explores themes of morality, cultural differences, and the importance of preserving life in the face of extinction.

Overall, "The Mark of Archanon" is a thought-provoking episode that asks important questions about the ethical responsibilities of advanced civilizations and the consequences of meddling in other worlds. Fans of science fiction and space exploration will enjoy the intergalactic adventure and the complex relationships between the Alphans and the Archanons.