Atlantis races against time to save team members trapped in a collapsed compound, and rescue a pregnant Teyla from Michael's clutches.
When a mysterious alien organism takes Dr. Keller as its host, Beckett and the crew deseperately search for a serum to save her from the evolving intruder before it can infiltrate Atlantis.
Ronon is captured by his former friend, Tyre, and turned over to the Wraith. As the team struggles for leads, Ronon goes on a torturous ordeal.
The Daedalus Variations
A drive malfunction aboard a mysterious duplicate Daedalus sends the team jumping thorugh various alternate realties where they encounter sinister alien life forms, a searing sun, and a pitched space battle over Atlantis.
Ghost in the Machine
A mysterious entity causes crippling havoc within the city's computer system.
While on a rescue mission to another planet, Dr. Rodney McKay falls fatally ill and his sister Jeannie is summoned from Earth to say her final goodbyes.
While exploring an abandoned catacomb on an unexplored planet, an Atlantis away team uncovers one of Michael's secret labs.
Teyla risks her life on a daring mission aboard a Wraith hive ship.
Pursued by Hunter Wraith, only Ronon's skills as a former Runner can save a kidnapped Dr. Keller.
Atlantis encounters a mysterious alien race when Dr. Rodney McKay and a visiting Dr. Daniel Jackson stumble upon the secret lab of a rebellious Ancient scientist named Janus.
The Lost Tribe
With the Daedalus under siege, Dr. Daniel Jackson and Rodney McKay try to keep a reactivated Ancient weapon from triggering a cataclysmic chain of events.
Col. Sheppard and his team, aided by Dr. Beckett, struggle to save survivors of the Hoffan plague from being sacrificed to the Wraith.
Sheppard and his team are abducted by a newly formed galactic coalition and made to stand trial for crimes against humanity.
An old foe, bent on revenge, infiltrates the Gate Room to take control of Atlantis. At the same time, Teyla and her infant son face a threat of deadly proportions.
Once again, the city is threatened by an old enemy. This one's captured Sheppard and no one knows how it's all going to play out.
Things heat up when Dr. Keller and Dr. McKay journey to Earth for a top-secret scientific demonstration by McKay's former rival, who claims to have the remedy for global warming.
The Atlantis team discovers that all the Wraith on board have placed themselves in stasis, the victims of a lethal affliction.
Dr. Jennifer Keller wakes to find her consciousness inside the body of a notorious thief, who was sentenced to death for her crimes.
Detective John Sheppard attempts to solve a string of unusual murders in Las Vegas.
Enemy at the Gate
Will the Atlantis team save Earth from and advanced Wraith Hive Ship?