2x01 The Siege (3)
July 15, 2005 9:00 pm
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.
2x02 The Intruder
July 22, 2005 9:00 pm
The Daedalus is infected by a Wraith computer virus, while members of the expedition hope to return to Earth.
2x03 Runner
July 29, 2005 9:00 pm
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.
2x04 Duet
August 5, 2005 9:00 pm
A run-in with a Wraith Dart leaves the consciousness of a precocious Atlantis security officer trapped in Dr. McKay's mind.
2x05 Condemned
August 12, 2005 9:00 pm
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.
2x06 Trinity
August 19, 2005 9:00 pm
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.
2x07 Instinct
August 26, 2005 9:00 pm
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.
2x08 Conversion
September 9, 2005 9:00 pm
Colonel Sheppard begins to undergo a disturbing physical transformation after being exposed to Beckett's anti-Wraith drug.
2x09 Aurora
September 23, 2005 9:00 pm
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.
2x10 The Lost Boys (1)
September 23, 2005 9:00 pm
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.
2x11 The Hive (2)
November 21, 2005 9:00 pm
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.
2x12 Epiphany
November 28, 2005 9:00 pm
Sheppard finds himself on a planet where time passes more rapidly, with no way to contact his team or return to Atlantis.
2x13 Critical Mass
December 5, 2005 9:00 pm
1
watching
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.
2x14 Grace Under Pressure
December 12, 2005 9:00 pm
When Dr. McKay is trapped underwater in a sinking Puddle Jumper, his only chance for survival may be an hallucination of Samantha Carter.
2x15 The Tower
December 19, 2005 9:00 pm
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.
2x16 The Long Goodbye
January 2, 2006 9:00 pm
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.
2x17 Coup D'Etat
January 9, 2006 9:00 pm
After a team from Atlantis goes missing, the expedition finds itself in the middle of a Genii coup.
2x18 Michael
January 16, 2006 9:00 pm
An amnesiac young Lieutenant in Atlantis suffers from disturbing nightmares that he is a Wraith, only to make a shocking discovery about himself.
2x19 Inferno
January 23, 2006 9:00 pm
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.
2x20 Allies (1)
January 30, 2006 9:00 pm
Michael and his Wraith faction arrive at Atlantis to propose an alliance, hoping to use the retrovirus to transform their Wraith enemies into prey.
