Stargate SG-1: Sunrise

Shortly after the events of the season 4 episode, "Beneath the Surface", SG-1 find themselves on a bleak and lifeless world. There they discover long-dead bodies frozen in the snow, and a clue to a device that promises protection from the Goa'uld forever. Following the trail they go in search of the Shield of the Gods, but all is not as it seems and soon SG-1 find themselves entangled with a people facing annihilation on a drowning world.