The first four episodes from the second season of the popular sci-fi series. The Stargate team embark on an incredible journey to the lost city of Atlantis. They must battle to defeat a gruesome, powerful new enemy known as the Wraiths, quickly forge new alliances, and simply survive. Their success will dictate whether they live long enough to gather the resources needed to return home from the intergalactic adventure of a lifetime. Episodes comprise: 'The Siege: Part III', 'The Intruder', 'Runner' and 'Duet'.