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 == Arcs == 
 I've tried to make arcs for the Stargate Atlantis article, are these one missing anything? (below) 

 === Wraith arc === 

 The pilot episode, set in 2004 after the events of Stargate SG-1 season seven episode, ""Lost City"". The pilot introduces the Wraith, a terrible foe that defeated the Ancients thousand of years ago. With not enough power to redial Earth, the Atlantis expedition is forced to search the Pegasus Galaxy for a power sources and new allies against the Wraith. In one of their first missions, they make another enemy in the Genii, a human militaristic civilization with a 1950s level of technology. Meanwhile, in season two First Lieutenant Aiden Ford escapes Atlantis after being injected by the Wraith enzyme. After a Wraith civil war lasting through late season 3 and season 4, the Wraith remains the major for in Stargate Atlantis throughout the shows run, topping in the final when they attack Earth. 

 === Michael arc === 

 The central plot of the second season is the development of Dr. Carson Beckett's retrovirus, which can, theoretically, turn a Wraith into a human, after a failed attempted on a Wraith known throughout the series as ""Michael Kenmore"". The experiment met with mixed results. Michael's wraith faction proposes an alliance with Atlantis, but they betray the team. After the defeat of the Asurans, the main antagonist of the series becomes Michael because of his efforts against both humans and the other Wraith. In the beginning of season five, Michael and his forces are seemingly crippled by an attack. Michael eventually tries to invad Atlantis with a commandeered Puddle Jumper to take Torren and to destroy the city, but the attacks fails and Kenmore is killed by John Sheppard. 

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