2004 | 55 Episodes
Season 0 of Stargate Atlantis premiered on July 3, 2004.
2004 | 20 Episodes
Season 1 of Stargate Atlantis premiered on July 15, 2004.
2005 | 20 Episodes
Season 2 of Stargate Atlantis premiered on July 15, 2005.
2006 | 20 Episodes
Season 3 of Stargate Atlantis premiered on July 13, 2006.
2007 | 20 Episodes
Season 4 of Stargate Atlantis premiered on September 27, 2007.
2008 | 20 Episodes
Season 5 of Stargate Atlantis premiered on July 10, 2008.
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