 | 1x01 Rising, Part 1 (Air Date: Jul. 16, 2004)
After the gate address to the lost city of Atlantis is found, an expedition departs to the Pegasus Galaxy to check it out. Unfortunately, the city is found on the bottom of the ocean floor, ... |  | 1x02 Rising, Part 2 (Air Date: Jul. 16, 2004)
The Wraith have captured many of the Athosians and SGA expedition members, before leaving through the Stargate. Back at Atlantis the shields continue to lose power, due to the limited energy ... |  | 1x03 Hide and Seek (Air Date: Jul. 23, 2004)
Kids playing a game of hide and seek in the city, accidentally release a strange and apparently malevolent energy force, which threatens all of Atlantis. Meanwhile, Dr. McKay’s experiment ... | | 1x04 Thirty-Eight Minutes (Air Date: Jul. 30, 2004)
After Sheppard is attacked by a strange, Wraith-like bug, the team heads back to Atlantis through the planet's orbital stargate. However, their Puddle Jumper gets stuck in the gate when ... | | 1x05 Suspicion (Air Date: Aug. 06, 2004)
The team comes in hot, having encountered the Wraith for the fifth time in nine missions. There’s no longer any doubt: someone in Atlantis spies for the Wraith. Weir convenes a planning ... | | 1x06 Childhood's End (Air Date: Aug. 13, 2004)
Shortly after detecting an energy field, the team's Puddle Jumper unexpectedly crashes. As they begin searching for the field's source to shut it down in order to get their Puddle Jumper ... | | 1x07 Poisoning the Well (Air Date: Aug. 20, 2004)
With Beckett's help, a planet's inhabitants create a drug capable of preventing the Wraith from feeding on them. However, they soon discover the devastating side effects it has on both the ... | | 1x08 Underground (Air Date: Aug. 27, 2004)
The Atlantis team travel to the planet of the Genii, known by the Athosians to be good traders of food and crops. As Tayla and Ford barter for food with the farmers, Sheppard and McKay stumble ... | | 1x09 Home (Air Date: Sep. 10, 2004)
After McKay discovers that a mist covering an alien planet can be used as a powerful energy source for the Stargate, the expedition is able to dial back to the SGC. Told that the Prometheus ... | | 1x10 The Storm (1) (Air Date: Sep. 17, 2004)
A devastating storm occurring every twenty or thirty years is detected approaching Atlantis. The city is evacuated while McKay, Weir, and Sheppard initiate a plan to use the storm's lightning ... | | 1x11 The Eye (2) (Air Date: Jan. 21, 2005)
With Weir and McKay held hostage by the Genii, Sheppard must figure out how to both rescue them and save Atlantis before the storm hits. | | 1x12 The Defiant One (Air Date: Jan. 28, 2005)
After locating an Ancient defense satellite, Sheppard, McKay, and two scientists detect a Wraith distress signal coming from a nearby planet. They investigate but soon become trapped when ... | | 1x13 Hot Zone (Air Date: Feb. 04, 2005)
When members of the expedition begin falling victim to a contagious nanite virus capable of causing death within hours, Atlantis goes into an automatic lockdown. [Read Recap below] |  | 1x14 Sanctuary (Air Date: Feb. 11, 2005)
When Sheppard and his team are fleeing from the Wraith in a planet's orbit, an energy wave suddenly wipes the enemy out. Thinking the planet has a powerful weapon, the team investigates, ... | | 1x15 Before I Sleep (Air Date: Feb. 18, 2005)
During a search of the city, the team finds a 10,000 year-old woman in suspended animation. Thinking she is an Ancient, they wake her up. However, she then reveals that she is Elizabeth ... |  | 1x16 The Brotherhood (Air Date: Feb. 25, 2005)
The team heads to one of the planets on the list of Ancient outposts, and with the help of the planet's inhabitants, they search for the ZPM. However, old foes show up and plan on taking ... | | 1x17 Letters from Pegasus (Air Date: Mar. 04, 2005)
McKay figures out how to send a message back to the SGC, prompting the expedition members to film messages for their families. | | 1x18 The Gift (Air Date: Mar. 11, 2005)
Teyla begins to have vivid nightmares about the Wraith. Soon this starts affecting her duties. She becomes easily distracted, causing Sheppard to order her to see Dr. Heitmeyer. The session ... | | 1x19 The Siege, Part 1 (Air Date: Mar. 18, 2005)
With a group of Wraith hive ships on the way to Atlantis, the team searches for a place to flee and a way to destroy the city. McKay leads a team to try and activate the Ancients' orbital ... | | 1x20 The Siege, Part 2 (Air Date: Mar. 25, 2005)
A new military contingent from Earth is sent to take command of Atlantis and defend it from the impending Wraith attack. |
 | 2x01 The Siege (Part 3) (Air Date: Jul. 15, 2005)
As Lt. Aiden Ford recovers from his near-fatal encounter with a Wraith, the team races against time to save the city from an impending Wraith assault. |  | 2x02 The Intruder (Air Date: Jul. 22, 2005)
A mysterious intruder has infected the Dadealus' computers with a virus that may allow them to take control of the ship. |  | 2x03 Runner (Air Date: Jul. 29, 2005)
Ronon Dex, a fierce survivor of a Wraith attack, may be the team’s only hope in combating the now dangerous, Wraith-infected Ford. |  | 2x04 Duet (Air Date: Aug. 05, 2005)
A technical glitch during their rescue from a Wraith ship forces McKay and Lt. Cadman to coexist inside McKay's body. |  | 2x05 Condemned (Air Date: Aug. 12, 2005)
While investigating a new planet, the team is ambushed by villagers. However, a strange craft appears, and rescues them. They learn the planet has a thriving and advanced society, despite ... |  | 2x06 Trinity (Air Date: Aug. 19, 2005)
McKay may have found a new and potent source of energy for Atlantis based on unperfected Ancient technology. |  | 2x07 Instinct (Air Date: Aug. 26, 2005)
Team finds a planet that has had almost no Wraith culling in the last ten years, or since the time a Wraith ship crash there. However, they are told that one or two survivors must still ... |  | 2x08 Conversion (Air Date: Sep. 09, 2005)
The team races to find a cure for the retrovirus that is mutating Sheppard into a Wraith. |  | 2x09 Aurora (Air Date: Sep. 23, 2005)
The Atlantis team discovers a derelict Ancient spacecraft where the crew is in stasis. They attempt to awaken the crew, but find the Wraith have something to say about this. The question ... |  | 2x10 The Lost Boys (1) (Air Date: Sep. 23, 2005)
Ford, who has survived being beamed aboard a Wraith ship, captures Col. Sheppard and his team. Ford has a daring plan to attack and destroy a Wraith Hive ship, and needs Col. Sheppard and ... |  | 2x11 The Hive (2) (Air Date: Jan. 06, 2006)
After being captured during a failed attempt to destroy a Wraith hive ship, Ford, Sheppard, Teyla, Ronin, and some of Ford’s team try to figure a way out of their mess. McKay, who was ... |  | 2x12 Epiphany (Air Date: Jan. 13, 2006)
The team discovers a portal on a distant planet that pulls Sheppard to another world, where he encounters a dangerous creature. Back on the other side, McKay learns troubling news about ... |  | 2x13 Critical Mass (Air Date: Jan. 20, 2006)
Atlantis is threatened by a bomb planted by the Goa'uld. Meanwhile, two Wraith cruisers are on course for the ancient city and a saboteur is unmasked. |  | 2x14 Grace Under Pressure (Air Date: Jan. 27, 2006)
McKay finds himself trapped in a Puddle Jumper which has crashed into the ocean and is sinking to the bottom. Col. Sheppard must not only locate McKay and the sinking missing Jumper before ... |  | 2x15 The Tower (Air Date: Feb. 03, 2006)
Maj. Sheppard’s team travels to another planet in hope of finding an advanced technologic society to fight the Wraith, only to find another agrarian society. However, they do find the ... |  | 2x16 The Long Goodbye (Air Date: Feb. 10, 2006)
Two pods are discovered 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 (Air Date: Feb. 17, 2006)
Ladon, a Genii scientist who was involved with the Genii’s attempt to capture Atlantis (S1E11: The Eye), contacts the SGA team to coerce them into helping him overthrow the Genii government ... |  | 2x18 Michael (Air Date: Feb. 24, 2006)
A man is being treated by Dr. Beckett who apparently has amnesia. As he slowly recovers his memory, a major secret is revealed. Also, the secret that Atlantis was not destroyed and Teyla’s ... |  | 2x19 Inferno (Air Date: Mar. 03, 2006)
With no way out and trapped on a planet with a volcano, it is up to Dr. McKay to find a way to get the team out of there. |  | 2x20 Allies (1) (Air Date: Mar. 10, 2006)
The Wraith, or at least one Hive ship, knows of Atlantis’ survival. They learn Michael is on the ship, and finally communicate with him. He tells them that too many Wraith awoke to too ... |
| 3x01 No Man's Land (2) (Air Date: Jul. 14, 2006)
With the Wraith ships headed for Earth, Sheppard must find a way to rescue Ronon and McKay. Meanwhile, the IOA makes life hard for Dr. Weir. | | 3x02 Misbegotten (3) (Air Date: Jul. 21, 2006)
As the Hive ship arrives above Atlantis, everyone is happy to find that Col. Sheppard and team are in control. However, the Wraith crew, now turned back in to humans using Dr. Becket’s ... | | 3x03 Irresistible (Air Date: Jul. 28, 2006)
As Sheppard’s team searches for unused gates to build an easier and faster path back to the Milky Way, they happen on a simple agrarian culture on a planet with an unused orbital gate. ... | | 3x04 Sateda (Air Date: Aug. 04, 2006)
Ronon and the team visit a friendly planet, only to find it unfriendly to Ronon, as Ronon brought the wrath of the Wraith down upon them, when they took Ronon in years before while he was ... | | 3x05 Progeny (Air Date: Aug. 11, 2006)
Atlantis discovers one of the Ancients’ abandoned research outposts, that turns out not to be abandoned.However, they find they have found a Replicator community living in an even greater ... | | 3x06 The Real World (Air Date: Aug. 18, 2006)
Dr. Weir awakens in a psychiatric hospital only to be told her memories of the last two years of her life were false; just a figment of a psychotic episode she has had over the last two ... | | 3x07 Common Ground (Air Date: Aug. 25, 2006)
In a convoluted plot to regain power over the Genii, former Commander Kolya captures Col. Sheppard, in order to bargain for the capture of the Genii Ladon. Strangely, Sheppard is able to ... | | 3x08 McKay and Mrs. Miller (Air Date: Sep. 08, 2006)
In a strange twist, McKay’s sister, an accomplished scientist and now a “stay at home” mother, may have found the solution to creating new ZPMs with out knowing it. But McKay’ sister, ... | | 3x09 Phantoms (Air Date: Sep. 15, 2006)
When Sheppard leads a team to find another overdue off-world team, they find the team members are all dead, except for their C.O., who is still missing. They’ve all been shot numerous ... | | 3x10 The Return (1) (Air Date: Sep. 22, 2006)
While Atlantis and Earth successfully test a “multiple gate” bridge between their two galaxies, the Daedalus detects another ship. When they try to make contact with the ship, the ship ... |  | 3x11 The Return (2) (Air Date: Apr. 13, 2007)
Sheppard and his team, along with Weir and Beckett, arrive in the Asuran's city and destroy the Replicators' stargate operations. The team then escapes, and tries to reprogram a Replicator ... |  | 3x12 Echoes (Air Date: Apr. 20, 2007)
When McKay finds his “whale” circling the floating city, strange events begin to occur. Teyla begins to see people that aren’t there. Then Weir begins to see the same people too. Soon ... |  | 3x13 Irresponsible (Air Date: Apr. 27, 2007)
Sheppard and his team head to a planet to investigate reports of a "superhero" in hopes this person might help in their struggle with the Wraith. What they find is a person they have had ... |  | 3x14 Tao of Rodney (Air Date: May. 04, 2007)
While trying to find ways to conserve power in Atlantis, Rodney stumbles upon a room that is using large amounts of power. In an attempt to shut it down he gets hit with a beam and starts ... |  | 3x15 The Game (Air Date: May. 11, 2007)
Major Lorne investigates a planet where one civilization has pictures of McKay, and SGA soon realizes it is connected to an Atlantis control room that McKay and Sheppard had found and thought ... |  | 3x16 The Ark (Air Date: May. 18, 2007)
Sheppard’s team discovers a space station filled with humans locked in a transporter module for hundreds of years. They bring two of them out of status, Jamus and Herick, and are told ... | | 3x17 Sunday (Air Date: Jun. 01, 2007)
It's a typical Sunday in Atlantis and everyone is going about their daily lives. A handsome scientist, Dr. Branton, who is smitten with Dr. Weir is trying to convince her to go to lunch ... |  | 3x18 Submersion (Air Date: Jun. 08, 2007)
While exploring an ancient drilling platform that could provide Atlantis with more power, the team gets cut off from the jumper and there might be a Wraith after them. | | 3x19 Vengeance (Air Date: Jun. 15, 2007)
When Atlantis loses contact with people on Taranis, Weir sends Sheppard and team to investigate. At first they find no life signs, but as they investigate further it appears there is at ... |  | 3x20 First Strike (1) (Air Date: Jun. 22, 2007)
A failed attack on a Replicator armada forces McKay to follow in the footsteps of the Ancients, millenia before, and take a drastic step to save Atlantis from destruction. |
 | 4x01 Adrift (2) (Air Date: Sep. 28, 2007)
Season 4 begins as Dr. Weir clings to life and Dr. McKay tries to save Atlantis, which is badly damaged and lost in space after the Replicator attack. |  | 4x02 Lifeline (3) (Air Date: Oct. 05, 2007)
Sheppard leads the crew on a mission the core of the Replicator home world. Meanwhile, Samantha Carter is in a race against time to locate Atlantis. |  | 4x03 Reunion (Air Date: Oct. 12, 2007)
Two years since Ronon Dex learned that a small handful of his people escaped the destruction of his home world Sateda the team encounter some of Ronon's own friends and fellow soldiers who ... |  | 4x04 Doppelganger (Air Date: Oct. 19, 2007)
Lt. Col. Sheppard touches a crystalline entity causing dreams to become reality and dangerous. |  | 4x05 Travelers (Air Date: Oct. 26, 2007)
Colonel Sheppard is is captured by the nomadic inhabitants of a fleet of spaceships who wish to use him for their own needs. |  | 4x06 Tabula Rasa (Air Date: Nov. 02, 2007)
The crew suffers from amnesia after plant samples from their new home planet unleash a virus that affects everyone except Teyla and Ronon. |  | 4x07 Missing (Air Date: Nov. 09, 2007)
Teyla and Dr. Keller discover an abandoned Athosian settlement and a hostile warrior tribe on New Athos. |  | 4x08 The Seer (Air Date: Nov. 16, 2007)
A psychic visitor delivers a dark forecast for the outpost while at Atlantis. Meanwhile, the Wraith propose an alliance to stop the Replicators, which are annihilating inhabited planets ... |  | 4x09 Miller's Crossing (Air Date: Nov. 30, 2007)
The Atlantis team responds when Dr. Rodney McKay's sister, Jeanie Miller, is kidnapped while on Earth. |  | 4x10 This Mortal Coil (1) (Air Date: Dec. 07, 2007)
A strange drone crashes into Atlantis, heralding a dreadful new predicament when Replicator doubles of the Atlantis team offer to help defend the city from the Wraith. |  | 4x11 Be All My Sins Remember'd (2) (Air Date: Jan. 04, 2008)
Now that they have a Replicator tracking unit to detect the enemy ships, the Atlantis team must destroy them once and for all. However, to do so they have to ally with the Wraith... who ... |  | 4x12 Spoils of War (Air Date: Jan. 11, 2008)
In the aftermath of the Replicator Homeworld destruction, the team discovers an abandoned Hive Ship and investigate. Aboard they find information that leads them to an outpost where the ... |  | 4x13 Quarantine (Air Date: Jan. 18, 2008)
An alarm starts a quarantine lockdown, causing members of the Atlantis team to be trapped in various areas of the city, including Rodney being stuck in the botany lab with Katie Brown. |  | 4x14 Harmony (Air Date: Jan. 25, 2008)
Sheppard and McKay escort a young princess on a rite of passage and come upon the queen-to-be's enemies. |  | 4x15 Outcast (Air Date: Feb. 01, 2008)
Upon learning his father has passed away, Col. Sheppard returns to Earth to attend the funeral. However, Col. Sheppard, along with Ronon who returned along with him, get sidetracked by news ... |
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