A planet in the Trialas system where Doctor Arik Soong secretly raised the Augment children he had taken as embryos from Cold Station 12.
Trialas IV is a planet referred to in the Enterprise Augment trilogy and visited in Cold Station 12. After stealing nineteen genetically engineered embryos left over from the Eugenics Wars, Arik Soong took them there and brought them up as his children.
Soong was caught and imprisoned when the Augments were about ten years old, and they were left to grow up alone. By 2154 they have left the planet, seized a Klingon bird-of-prey and begun raiding in the Borderland.
When Enterprise reaches Trialas IV the settlement is empty apart from Udar, known as Smike, the one child whose enhancements never developed and whom the others left behind. The schoolroom and living quarters give Archer his clearest view of how Soong shaped them.