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hen an undetected satellite crash lands into the city, it's confirmed that it's Replicator technology. Sheppard's immediate concern is that he and the others may have been infected with nano technology. Dr. Keller's scans and blood tests however show no infection. It's all an imaginary from Elizabeth Weir's memories world created by a renegade group of Replicators. When the fake Atlantis is destroyed, the lookalikes contact their real counterpoints to give them information they can use against the Replicators.

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