The season opens with a desperate race against time. Following a devastating Asuran attack, Atlantis is left drifting in deep space with failing shields and a critically injured leader, Dr. Elizabeth Weir.
: The team encounters the "Travelers," a nomadic human race living on ships, and deals with a malfunctioning nanite virus spreading across the Pegasus Galaxy. Major Cast Changes Season 4 reshaped the dynamic of the main cast: Stargate Atlantis - Season 4 ...
: Teyla Emmagan spends much of the season searching for her missing people, who were kidnapped by the hybrid Michael Kenmore for his genetic experiments. The season opens with a desperate race against time