The plot follows the adventures of the "Atlantis expedition", a combination of military forces and civilian scientists that travel to the Pegasus galaxy in search of the Lost City of Atlantis, left behind by the powerful race known asthe Ancients. Watch it all in this complete series box set.Synopsis - Stargate Atlantis: Complete 1st Season (2004) When Sg-1 discovers what it believes to be the remnants of the Lost City of the Ancients - the originators of the Stargates - Stargate Command sends a new team of explorers to investigate the discovery. From the producers of SG-1 and The Outer Limits and featuring top-notch specialt effects, Stargate Atlantis is available as a 5 disc set, containing all 20 episodes from Season 1.Synopsis - Stargate Atlantis: The Complete Season 5 (Slimline) (2004) An international team of scientists and military personnel discover a Stargate network in the Pegasus Galaxy and come face-to-face with a new, powerful enemy, The Wraith.Synopsis - Stargate Atlantis: Complete 2nd Season (2004) When Sg-1 discovers what it believes to be the remnants of the Lost City of the Ancients - the originators of the Stargates - Stargate Command sends a new team of explorers to investigate the discovery.Synopsis - Stargate Atlantis: Complete 4th Season (2006) The Stargate universe is exhilaratingly expanded and the epic feel of the franchise is perfected in this acclaimed spin-off of the Stargate SG-1 series, itself spun-off from the 1994 blockbuster from director Roland Emmerich. In Stargate: Atlantis, an international crew of scientists and soldiers finds yet another Stargate...one which leads to the Lost City of Atlantis. This Stargate, though, isn't on Earth but in the far-away Pegasus Galaxy, and the secret city holds a formidable new enemy-- the Wraith. With this fourth season of the hit sci-fi series, things take a turn in a bleak new direction, with team leader Dr. Weir injured and captured by the evil Asurans as the damaged city of Atlantis drifts