Planet SG-3 was scheduled for standard recon at approximately the same time SG-1 was captured and held as prisoners by the Taldur. Daniel Jackson remembered SG-3 would be at P2A-509, and the team had Teal'c manually dial the planet to obtain one off SG-3's G.D.O.'s to return to Earth safely.
HOME TO - Unknown
FIRST APPEARED - N/A
Prisoners - SG-1 travels to P2A-509 following their escape from Hadante to obtain a G.D.O. to get back to Earth.