Stargate Atlantis: Season 2, Episode 16

2 - 16: The Long Goodbye

Above an isolated moon, Sheppard's team discovers two battered life pods in decaying orbits. They bring them to Atlantis, where Dr. McKay opens the first pod. An aged, unconscious woman lies within, near death. When Dr. Weir approaches for a closer look, an energy beam lances out of the pod and strikes her. Weir collapses.