Planet under the control of the strict judicial body known as the Taldur. The destroyer of worlds, Linea, once lived on the planet. Linea conceived a terrible sickness (impervious to her D.N.A.) that began to wipe out the people of the Taldur's island states during a time they were at war.
By the time Linea was discovered and apprehended, half the world's population was dead.
Prisoners - SG-1 arrives on P3X-775 and, after protecting a local resident, are sentenced by the Taldur to life in prison.