• Air date: 15 Jul '05 20 episodes
      The second season of the television series Stargate Atlantis commenced airing on the Sci Fi Channel in the United States on July 15, 2005, concluded on The Movie Network in Canada on January 30, 2006, and contained 20 episodes. The show itself is a spin off of its sister show, Stargate SG-1. The series was developed by Brad Wright and Robert C. Cooper, who also served as executive producers. Season two regular cast members include Joe Flanigan, Torri Higginson, Jason Momoa, Rachel Luttrell, Paul McGillion, and David Hewlett as Dr. Rodney McKay. The second season focuses on the Atlantis Expedition continuing to make the Wraith think that they self-destructed the city while continuing to explore Pegasus and hunt for ZPMs this means at times lying to new allies about the city even sometimes claiming to be a small contingent that escaped the Siege; the season also marks the first time the Expedition is able to make contact with Earth although doing so uses a lot of power so the contact is at often times via the Daedalus, an intergalactic Earth-Asgard vessel commanded by Col. Steven Caldwell who makes clear his desire to be Military Leader of Atlantis but eventually settles for a sort of advisory role as it becomes clear that Dr. Weir and the Lt.Col Sheppard are a duo not to be messed with. The central plot of the second season is the development of Dr. Beckett's retrovirus, which can, theoretically, turn a Wraith into a human.
  • List of Episodes (20)
    • 1. The Siege (3)

      15 Jul '05
      The Daedalus arrives to defend Atlantis from the Wraith onslaught, but it may not be enough when the team discovers that an even larger armada is on the way.
    • 2. The Intruder

      22 Jul '05
      The Daedalus is infected by a Wraith computer virus, while members of the expedition hope to return to Earth.
    • 3. Runner

      29 Jul '05
      Sheppard and his team attempt to locate Lieutenant Ford, only to find themselves captives of a former soldier who is being hunted by the Wraith.
    • 4. Duet

      05 Aug '05
      A run-in with a Wraith Dart leaves the consciousness of a precocious Atlantis security officer trapped in Dr. McKay's mind.
    • 5. Condemned

      12 Aug '05
      The Atlantis team finds a culture that lives in relative safety from the Wraith, because they hand over their criminals to the Wraith -- and crash-land in the volatile penal colony.
    • 6. Trinity

      19 Aug '05
      McKay puts the team at risk when he tries to perfect unfinished Ancient technology that wiped out a civilization. Ronon Dex discovers that he is not the lone survivor from his world.
    • 7. Instinct

      26 Aug '05
      The team discovers a young Wraith girl who has been raised by a human, and is in hiding from the people of her human village in fear of her life.
    • 8. Conversion

      09 Sep '05
      Colonel Sheppard begins to undergo a disturbing physical transformation after being exposed to Beckett's anti-Wraith drug.
    • 9. Aurora

      23 Sep '05
      When the team finds an Ancient warship adrift on the edge of the galaxy, its crew still alive, Colonel Sheppard enters their virtual reality stasis to communicate with them.
    • 10. The Lost Boys (1)

      23 Sep '05
      The team is captured by the missing Lieutenant Ford, who is now leading a group of young men who are taking the Wraith enzyme -- and who wants the team's help in a suicide attack against a hive ship.
    • 11. The Hive (2)

      16 Nov '05
      Colonel Sheppard and his team find themselves prisoners of the Wraith following Ford's attack on a hive ship. Dr. McKay goes to great lengths to help them.
    • 12. Epiphany

      28 Nov '05
      Sheppard finds himself on a planet where time passes more rapidly, with no way to contact his team or return to Atlantis.
    • 13. Critical Mass

      05 Dec '05
      When an operative of the Trust plants a bomb in Atlantis, the team must find a spy within their own ranks before the Wraith arrive and discover the city.
    • 14. Grace Under Pressure

      10 Dec '05
      When Dr. McKay is trapped underwater in a sinking Puddle Jumper, his only chance for survival may be an hallucination of Samantha Carter.
    • 15. The Tower

      19 Dec '05
      The team finds a world that possesses Ancient defense technology, where Colonel Sheppard finds himself a pawn in the rivalry between the heirs to the throne.
    • 16. The Long Goodbye

      02 Jan '06
      The team discovers two pods that contain the minds of alien beings, who take control of Weir and Sheppard's bodies to continue their personal war.
    • 17. Coup D'etat

      09 Jan '06
      After a team from Atlantis goes missing, the expedition finds itself in the middle of a Genii coup.
    • 18. Michael

      16 Jan '06
      An amnesiac young Lieutenant in Atlantis suffers from disturbing nightmares that he is a Wraith, only to make a shocking discovery about himself.
    • 19. Inferno

      23 Jan '06
      Sheppard's team meets a civilization about to be destroyed by a super-volcano, and is trapped there when the Stargate is destroyed during the evacuation.
    • 20. Allies (1)

      30 Jan '06
      Michael and his Wraith faction arrive at Atlantis to propose an alliance, hoping to use the retrovirus to transform their Wraith enemies into prey.