E1 - No Man's Land (2)

Aired: July 13, 2006

The team desperately attempts to stop two Wraith hive ships from reaching Earth. Sheppard must rely on an old foe to rescue McKay and Ronon.

E2 - Misbegotten (3)

Aired: July 20, 2006

The Atlantis team must decide the fate of a colony of Wraith they have turned into humans. Dr. Weir must defend her leadership when she is evaluated by the I.O.A.

E3 - Irresistible

Aired: July 27, 2006

Sheppard's team meets an obnoxious man who is adored by all thanks to a secret that he carries -- and who has an unexpected effect on them.

E4 - Sateda

Aired: August 03, 2006

Ronon Dex is captured by the Wraith and returned to his homeworld, where he is haunted by his past as he is forced to once again become their prey.

E5 - Progeny

Aired: August 10, 2006

Weir and the team visit an advanced civilization that split off from the Lanteans thousands of years ago, but discover that they may not have left Atlantis in peace.

E6 - The Real World

Aired: August 17, 2006

Elizabeth Weir wakes up in a mental institution, where she is told that the expedition to Atlantis and the Stargate are figments of her imagination.

E7 - Common Ground

Aired: August 24, 2006

Colonel Sheppard finds himself the prisoner of a Genii commander, along with a desperately hungry Wraith who has been separated from his hive.

E8 - McKay and Mrs. Miller

Aired: September 07, 2006

Rodney McKay is reunited with his estranged sister back on Earth, who has given up a brilliant career as a scientist to raise a family.

E9 - Phantoms

Aired: September 14, 2006

Sheppard and Ronon are influenced by a mind-altering device created by the Wraith while on a mission to rescue a lost team.

E10 - The Return (1)

Aired: September 21, 2006

The Atlantis expedition is stunned to learn that a ship full of Ancients is returning to reclaim their lost city.

E11 - The Return (2)

Aired: November 19, 2006

The Atlantis team goes against orders to try and save Atlantis from Replicator control -- and to rescue General O'Neill and Richard Woolsey, who are trapped in the occupied city.

E12 - Echoes

Aired: November 26, 2006

The inhabitants of Atlantis begin to suffer ill effects when the planet's whale population begins migrating to the island city, bringing an unexpected harbinger of doom.

E13 - Irresponsible

Aired: December 03, 2006

The team finds Lucius Lavin manipulating the people of another hapless planet, using Ancient technology to pose as an invincible hero.

E14 - Tao of Rodney

Aired: December 10, 2006

After an Ancient device gives Rodney superhuman powers, his enhanced brilliance is checked only by his impending death -- unless he can learn how to ascend.

E15 - The Game

Aired: December 17, 2006

Sheppard and McKay discover that their competitive video game has been controlling a planet of real people, who now stand on the brink of war.

E16 - The Ark

Aired: January 07, 2007

The team discovers the last of a civilization in suspended animation, whose survival is at risk when their station is critically damaged.

E17 - Sunday

Aired: January 11, 2007

The team tries to relax during a mandatory day off, until an explosion leaves three people dead -- and reveals that one scientist is a walking time bomb.

E18 - Submersion

Aired: January 14, 2007

The team discovers an Ancient drilling station deep beneath the surface of the ocean, only to find that a Wraith queen is still alive there.

E19 - Vengeance

Aired: January 28, 2007

The Atlantis team investigates the disappearance of one of their allies, only to find an old enemy engineering a race of powerful monsters.

E20 - First Strike (1)

Aired: February 04, 2007

An unstoppable energy weapon leaves Atlantis under siege after Earth launches a preemptive attack against a very powerful enemy's homeworld.