Home / Series / Stargate Atlantis / Aired Order / Season 4 / Episode 4
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Doppelganger

During an off-world mission Colonel Sheppard unknowingly becomes host to an alien entity, which infects others in Atlantis and afflicts them with terrifying nightmares.

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  • Originally Aired October 19, 2007
  • Runtime 45 minutes
  • Content Rating United States of America TV-PG
  • Production Code 401
  • Network SYFY
  • On Other Sites IMDB
  • Created November 17, 2016 by
    Administrator admin
  • Modified November 15, 2022 by
    bruninhopsj
Name Type Role
Robert C. Cooper Writer
Linda Ko Guest Star
Yee Jee Tso Guest Star
Robert C. Cooper Director