The Ghosts of Sanctity

The Ghost of Sanctity was a short story which appeared in Stargate SG-1/Atlantis/SG:U: The Official Magazine 34 and was written by Peter J Evans.

Publishers Summary
As the team arrive on Sanctity they discover they are too late to help its people. It seems the planet is deserted. That is until creatures start to emerge from the shadows

Chronological Placement
This short story takes place during season 5 of Stargate SG-1.