In an alternate timeline, members of the Atlantis expedition discovered a special Puddle Jumper in Atlantis's Jumper bay, one which was capable of time travel. In that reality, the expedition had suffered tragedy immediately upon arriving at the Ancient city, because the shield had begun to fail from lack of power, causing the city to flood. Desperate and with no method of escape, the alternate versions of Major John Sheppard, Dr. Elizabeth Weir, and Dr. Radek Zelenka sealed themselves in this Jumper as the Jumper bay flooded. They subsequently activated the time device by accident.