story into the narrative of his novel: (1) As this story immediately follows 'Collision Course', Retha would appear from behind Atheria after that world's disappearance; (2) Carter and Sandra were romantically involved after her previous (unseen) break-up with Morrow; (3) The temporally-transformative mist was not confined to one area; when Koenig fired into the ground to frighten away whatever was watching him and Helena, mist rose up from the hole blasted in the soil and engulfed the pair. References External links Space: 1999 - "The Full Circle" - The Catacombs episode guide Space: 1999 - "The Full Circle" - Moonbase Alpha's Space: 1999 page 1975 British television episodes Space: 1999 episodes