1: Adrift (2)
Sep 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.
Season 4
Stargate Atlantis
20 EPISODES • 2007
Season 4 of Stargate Atlantis was released on September 27 and consists of 20 episodes.Episodes
2: Lifeline (3)
Oct 4, 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.
3: Reunion
Oct 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.
4: Doppelganger
Oct 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.
5: Travelers
Oct 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.
6: Tabula Rasa
Nov 1, 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.
7: Missing
Nov 8, 2007
During a visit to New Athos, Teyla and Dr. Keller find themselves on the run from a primitive tribe of warriors.
8: The Seer
Nov 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.
9: Miller's Crossing
Nov 29, 2007
Rodney McKay goes in search of his sister on Earth after she is kidnapped by the head of a powerful corporation.
10: This Mortal Coil (1)
Dec 6, 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.
11: Be All My Sins Remember'd (2)
Jan 3, 2008
With a plan to potentially extinguish the Replicator threat, the Atlantis team must seek an alliance with a fleet of Wraith ships.
12: Spoils of War
Jan 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.
13: Quarantine
Jan 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.
14: Harmony
Jan 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.
15: Outcast
Jan 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.
16: Trio
Feb 7, 2008
McKay, Carter, and Keller are trapped in an underground chamber while on an off-world mission, with no apparent means of escape.
17: Midway
Feb 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.
18: The Kindred (1)
Feb 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.
19: The Kindred (2)
Feb 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.
20: The Last Man (1)
Mar 6, 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.
Season 5
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