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 desperately 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 scrambles for leads, Ronon undergoes a torturous ordeal.
A drive malfunction aboard a mysterious duplicate Daedalus sends the team jumping through various alternate realities where they encounter sinister alien life forms, a searing sun, and a pitched space battle over Atlantis.
A mysterious entity causes crippling havoc within the city's computer systems.
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.
With Hunter Wraith in close pursuit, only Ronan's uncommon skills as a former Runner may 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.
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. John Sheppard and his team, aided by Dr. Carson 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.
While Richard Woolsey struggles to keep his position as the leader of Atlantis, and McKay and Zelenka investigate a mysterious find, Sheppard is captured by an old enemy with plans to invade the city.
Dr. Keller accompanies Dr. McKay to Earth to attend a top secret scientific demonstration by McKay's former rival.
Atlantis receives a distress signal from a hive ship and 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 has been sentenced to death for her crimes.
Detective John Sheppard attempts to solve a string of unusual murders in Las Vegas.
Atlantis rushes to destroy an advanced Wraith hive ship before it presents a threat to Earth.
