"stargate atlantis" premiered on july 16, 2004 on the channel sci fi channel. the sci fi channel would air all the five seasons made for the series. since the american broadcast splits each season to allow the production to catch up, the british and canadian channels sky one and the movie network aired the second part of some seasons before their american counterpart. "stargate atlantis"<nowiki>'</nowiki> finale episode premiered in the united states on the sci fi channel on january 9, 2009. the series finale was also the series' 100th episode. all five seasons of "stargate atlantis" are available on dvd. a direct-to-dvd film tentatively titled "stargate: extinction" was planned, but was later shelved.