Episodes 20
The Siege (3)
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.
Read MoreThe Intruder
The Daedalus is infected by a Wraith computer virus, while members of the expedition hope to return to Earth.
Read MoreConversion
Colonel Sheppard begins to undergo a disturbing physical transformation after being exposed to Beckett's anti-Wraith drug.
Read MoreThe Lost Boys (1)
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.
Read MoreThe Hive (2)
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.
Read MoreCritical Mass
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.
Read MoreGrace Under Pressure
When Dr. McKay is trapped underwater in a sinking Puddle Jumper, his only chance for survival may be an hallucination of Samantha Carter.
Read MoreThe Long Goodbye
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.
Read MoreCoup D'etat
After a team from Atlantis goes missing, the expedition finds itself in the middle of a Genii coup.
Read MoreAllies (1)
Michael and his Wraith faction arrive at Atlantis to propose an alliance, hoping to use the retrovirus to transform their Wraith enemies into prey.
Read More