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From SCIFIPEDIA
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Instinct is the seventh episode of Stargate Atlantis Season 2. This episode first aired on August 26, 2005.
Spoiler Warning: Plot details and/or information about the ending follow. If you wish to enjoy the work first, stop reading here and return at another time.
Plot
The team visits a planet where the locals are being plagued by a beast in the woods they immediately recognize from descriptions as a Wraith. They volunteer to kill the creature but discover in the woods , a young Wraith girl being raised by a human, Zaddik, who claims he has cured her of her need for humans life energy. Dr. Beckett's investigations prove Zaddik's serum ineffective however, and Elia admits to her "father" that she has been forced to take human life to survive. She has also run into another Wraith, the only other survivor of the Wraith vessel that crashed on the planet several years before. The villagers killed the others but Zaddik rescued Elia from the wreck.
When Ellia overhears Beckett discussing a Wraith retrovirus he has been working on to transform Wraith into humans, she sees hope for becoming human and steals the drug. The drug doesn't perform as expected however and Elia begins to take on more prominent Iratus bug features. Now in addition to the adult Wraith male, the team must find and kill Ellia as well before she harms anyone.
Guest Stars
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