While exploring the unused sections of Atlantis, Major John Sheppard and Dr. Rodney McKay stumbled on a recording device that revealed the Stargate address to this planet. Believing that the address may lead them to a vast repository of Ancient knowledge, the team embarked on a mission to this uncharted world. There, they discovered this ruined city, full of whispered secrets and dark shadows. (SGA: "Reliquary")