Stargate Atlantis Season 4

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Adrift (2)
4.5
15 votes
4x01 Adrift (2) aired Sep 28, 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... read more

Lifeline (3)
4.4
14 votes
4x02 Lifeline (3) aired Oct 05, 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 suc... read more

Reunion
3.7
14 votes
4x03 Reunion aired Oct 12, 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... read more

Doppelganger
3.6
14 votes
4x04 Doppelganger aired Oct 19, 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 ... read more

Travelers
4
13 votes
4x05 Travelers aired Oct 26, 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 ... read more

Tabula Rasa
3.8
14 votes
4x06 Tabula Rasa aired Nov 02, 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.

Missing
3.5
13 votes
4x07 Missing aired Nov 09, 2007

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

The Seer
3.5
13 votes
4x08 The Seer aired Nov 16, 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 At... read more

Miller's Crossing
3.5
13 votes
4x09 Miller's Crossing aired Nov 30, 2007

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

This Mortal Coil (1)
3.8
12 votes
4x10 This Mortal Coil (1) aired Dec 07, 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 th... read more

Be All My Sins Remember'd (2)
4.4
13 votes
4x11 Be All My Sins Remember'd (2) aired Jan 04, 2008

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

Spoils of War
3.8
13 votes
4x12 Spoils of War aired Jan 11, 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.

Quarantine
3.7
13 votes
4x13 Quarantine aired Jan 18, 2008

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

Harmony
3.4
13 votes
4x14 Harmony aired Jan 25, 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 threatenin... read more

Outcast
3.3
12 votes
4x15 Outcast aired Feb 01, 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.

Trio
3.8
12 votes
4x16 Trio aired Feb 08, 2008

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

Midway
4.5
13 votes
4x17 Midway aired Feb 15, 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 spa... read more

The Kindred (1)
3.8
12 votes
4x18 The Kindred (1) aired Feb 22, 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.

The Kindred (2)
3.9
12 votes
4x19 The Kindred (2) aired Feb 29, 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.

The Last Man (1)
4.2
12 votes
4x20 The Last Man (1) aired Mar 07, 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.

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