Novelisation
The episode was adapted in the sixth Year Two Space: 1999 novel The Edge of the Infinite by Michael Butterworth published in 1977. This novel was not released in the United Kingdom and only as a limited edition in the United States and Germany.
The original German-published novel Der Stahlplanet (The Steel Planet) would provide a sequel to this story as, after a course change, the Moon moves beyond the eclipsing star cluster and contact is re-established with Earth. The Alphans are ultimately transported home, concluding the Space: 1999 narrative.
Read more about this topic: Journey To Where