Fri, Jun 4, 1976
A spaceship is on an expedition to an Earth-like planet when one of its reactors explodes, killing everyone but two of the crew. Since radiation is fatal, they must figure out how to get the spacecraft back to Earth with all the research they have done on the planet's indigenous people, a human-like group, but in an earlier stage of evolution. The plan of the research engineer is to transfer his knowledge to one of the inhabitants.
Fri, Jun 11, 1976
After two hundred years, when radiation drops below critical levels, the traps are activated and begin transforming captured humanoids into research astronauts. Despite initial success, one of the spiritual upgrades ends up in a bloody massacre. Now, despite Sid's strong protest, Gill tries to continue their plan with a tribe more advanced than them, but they create a being above them, which will have fatal consequences for them.
Wed, Jun 16, 1976
Hundreds of years after the mission began, the Galatea spacecraft finally heads back to Earth with a completely new crew on board. Their leader, Mat, subordinates everything to the execution of the task, but the others disagree, a riot breaks out and they capture Mat. They plan to return to their home-planet, but soon realize they don't have enough fuel to do so, so they must land on Earth anyway. Contrary to their expectations, a completely different world awaits them than they imagined according to their newly gained memories.