Episodes 5-8 from the fourth season of the popular sci-fi series following a new Stargate team as they embark on an incredible journey to the Lost City of Atlantis. The team 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: 'Travelers', 'Tabula Rasa', 'Missing' and 'The Seer'.