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Season 1 - Jul. 15, 2004
Season 2 - Jul. 15, 2005
Season 3 - Jul. 14, 2006
Season 4 - Sep. 28, 2007
Season 5 - Jul. 11, 2008
Stargate Atlantis Season 4 Episode 6
HD
Overview:
When a virus causes amnesia in everyone except Teyla and Ronon, the Atlantis team must work together to find a cure before their memories fade entirely.