E1 - Adrift (2)

Aired: September 27, 2007

Floating in deep space with the city's protective shield failing, the team must do all they can to keep Atlantis alive. A radical injury threatens Dr. Weir's life.

E2 - Lifeline (3)

Aired: October 04, 2007

Colonel Sheppard and his team embark on a risky mission to steal a Z.P.M. power module from the Replicators -- but must rely on a compromised Dr. Weir to succeed.

E3 - Reunion

Aired: October 11, 2007

When a group of Ronon's people enlist the team's help in raiding a Wraith weapons facility, Ronon reconsiders whether his future lies in Atlantis or with his friends.

E4 - Doppelganger

Aired: October 18, 2007

During an off-world mission Colonel Sheppard unknowingly becomes host to an alien entity, which infects others in Atlantis and afflicts them with terrifying nightmares.

E5 - Travelers

Aired: October 25, 2007

Colonel Sheppard is captured by the inhabitants of a generational ship and their beautiful leader, who wish to use his ability to use Ancient technology for their own ends.

E6 - Tabula Rasa

Aired: November 01, 2007

When a virus causes amnesia in everyone except Teyla and Ronon, the Atlantis team must work together to find a cure before their memories fade entirely.

E7 - Missing

Aired: November 08, 2007

During a visit to New Athos, Teyla and Dr. Keller find themselves on the run from a primitive tribe of warriors.

E8 - The Seer

Aired: November 15, 2007

The team meets a man with extraordinary prophetic abilities, who gives them a dark prediction about Atlantis's future. The Wraith seek a new alliance with Atlantis in their war with the Replicators.

E9 - Miller's Crossing

Aired: November 29, 2007

Rodney McKay goes in search of his sister on Earth after she is kidnapped by the head of a powerful corporation.

E10 - This Mortal Coil (1)

Aired: December 06, 2007

A mysterious drone crashes into Atlantis, indicating that the Replicators may have found the city. But when Elizabeth Weir appears, the team realizes that the probe is just a part of a bigger mystery.

E11 - Be All My Sins Remember'd (2)

Aired: January 03, 2008

With a plan to potentially extinguish the Replicator threat, the Atlantis team must seek an alliance with a fleet of Wraith ships.

E12 - Spoils of War

Aired: January 10, 2008

The team finds their former Wraith ally's hive ship drifting in space, which leads them to a secret project that could turn the tide of a civil war.

E13 - Quarantine

Aired: January 17, 2008

An automated lockdown traps Atlantis personnel in various parts of the city, each of them hoping the others will come to their rescue.

E14 - Harmony

Aired: January 24, 2008

Colonel Sheppard and Dr. McKay must protect a child princess on a pilgrimage before she can become queen, and learn that she has dangerous enemies threatening her life.

E15 - Outcast

Aired: January 31, 2008

While on personal leave on Earth, Sheppard and Ronon learn that scientists have engineered a human-form Replicator -- who is now on the loose.

E16 - Trio

Aired: February 07, 2008

McKay, Carter, and Keller are trapped in an underground chamber while on an off-world mission, with no apparent means of escape.

E17 - Midway

Aired: February 14, 2008

Teal'c visits Atlantis to counsel a headstrong Ronon, who is up for review by the I.O.A. But the two must work together when the Wraith invade the Midway space station in order to reach Earth.

E18 - The Kindred (1)

Aired: February 21, 2008

As a mysterious new illness sweeps through the Pegasus Galaxy, Teyla is convinced by a vision that the father of her child is trying to communicate with her.

E19 - The Kindred (2)

Aired: February 28, 2008

The team is shocked when an old friend, believed to be dead, miraculously returns to them. Teyla plans an escape from Michael's captivity.

E20 - The Last Man (1)

Aired: March 06, 2008

Sheppard returns to Atlantis after a mission and finds the city abandoned, all systems dead -- and instead of ocean, sand dunes as far as the eye can see.