Part 1:   • Human ancestors implanted a horrible ...  
Part 3:   • Astronauts mistakenly entered the ali...  
Part 4:   • Woman drifting in space for 57 years,...  
Part 5:   • Humans are being used as a breeding v...  
Part 6:   • Alien and human hybrid monsters it ha...  

A colony spacecraft carries 2,000 colonists on their way to establish a new home on the distant planet of Omega VI.
An accident damages the ship's energy-harvesting sails, and they subsequently land on an unknown planet.
Here they meet David by chance, and the group learns of his story and that of Dr. Shaw.
Just as David wins the group's trust, they are unaware that he is hiding an untold secret.