A moon base, time travel, huge space battles, and thats just the beginning Stargate Atlantis was canceled after its fifth season, but the story wasnt supposed to. Stargate Atlantis often abbreviated SGA is a CanadianAmerican adventure and military science fiction television series and part of MGMs Stargate franchise. In the science fiction television series Stargate Atlantis, the Wraith are the original enemy alien species, first introduced in the pilot episode Rising. Watch Maybe Torent Free. Stargate Atlantis Episodes Watch' title='Stargate Atlantis Episodes Watch' />Shush.