Halcyon

Halcyon was a grim industrial planet in the Pegasus galaxy where the Wraith are no longer feared—they are hunted.

On their ongoing quest for new allies, Atlantis 1 traveled to Halcyon. Horrified by the brutality of Halcyon's warlike people, Lieutenant Colonel John Sheppard became caught in the political machinations of Halcyon's aristocracy. In a feudal society where strength means power, he realized the nobles would stop at nothing to ensure victory over their rivals.

Meanwhile, Dr. Rodney McKay enlisted the aid of the ruler's daughter to investigate a powerful Ancient structure on the planet.