The Defiant One - [s1e12]

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While exploring a Lagrangian point satellite —an Ancient defense system located deep in space—Major John Sheppard and Dr. Rodney McKay intercept a distress signal from a nearby planet. Upon investigation, they discover a crashed that has been down for 10,000 years. [S1E12] The Defiant One

is the 12th episode of the first season of Stargate Atlantis . In this episode, a mission to investigate an ancient weapons platform turns into a desperate survival situation against a long-dormant enemy. Plot Summary You can find more detailed credits and episode