Stargate Atlantis 4x4
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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Stargate Atlantis season 4
4x1Adrift (2) Sep 28, 2007
4x2Lifeline (3) Oct 05, 2007
4x3Reunion Oct 12, 2007
4x4Doppelganger Oct 19, 2007
4x5Travelers Oct 26, 2007
4x6Tabula Rasa Nov 02, 2007
4x7Missing Nov 09, 2007
4x8The Seer Nov 16, 2007
4x9Miller's Crossing Nov 30, 2007
4x10This Mortal Coil (1) Dec 07, 2007
4x11Be All My Sins Remember'd (2) Jan 04, 2008
4x12Spoils of War Jan 11, 2008
4x13Quarantine Jan 18, 2008
4x14Harmony Jan 25, 2008
4x15Outcast Feb 01, 2008
4x17Midway Feb 15, 2008
4x18The Kindred (1) Feb 22, 2008
4x19The Kindred (2) Feb 29, 2008
4x20The Last Man (1) Mar 07, 2008