P3X-775
From The Stargate Omnipedia
Planet under the control of 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 she was discovered, half the world's population was dead.
DETAILS
HOME TO - People of the Taldur
FIRST APPEARED - Prisoners
KEY EPISODE
Prisoners - SG-1 arrives on P3X-775 and, after protecting a local resident, are sentenced by the Taldur to life in prison.