List of Stargate Atlantis episodes

This article provides a list of episodes from the television series Stargate Atlantis.

See Stargate for information on the Stargate fictional universe, Stargate Atlantis for information on the series itself and the List of Stargate SG-1 episodes for the Stargate SG-1 series.

Seasons One and Two of Stargate Atlantis are currently available for purchase on DVD in Australia, the United Kingdom, the USA, Canada and Germany. Season Three has finished airing and will be available on September 18, 2007 in the USA and Canada. The show was renewed for a fourth season in August 2006, which will start airing 10 days after the Season Three DVD set is released.

As of February 5, 2007, 60 episodes total have been aired.

Season 1

The Lost City will rise again. The series picks up the story arc from Stargate SG-1's Lost City, where people from all around the world come together to form an expedition and discover the wonders of Atlantis. Discovering that they have been cut off from Earth, they must fend for themselves, and discover a powerful new enemy bent on human subjugation.

Ep#	Title	Original airdate
101	"Rising (Part 1)"	July 16, 2004
After relinquishing her position at Stargate Command, Dr. Elizabeth Weir has been working in the Antarctic Outpost, gathering members of an expedition to embark to the lost city of Atlantis. When they seem to be able to ascertain a gate address, a new adventure begins.
102	"Rising (Part 2)"	July 16, 2004
After Sheppard's return with refugees from Athos, Atlantis, moments away from being crushed, breaks away from the ocean floor, rising to the surface just before the shield fails. Now, given a chance to rescue his people, Sheppard needs make Weir see things his way.
103	"Hide and Seek"	July 23, 2004
Eager to experiment with new technology, Dr. McKay volunteers to be Dr. Beckett's first patient for his new ATA gene therapy. Able to use this device, McKay recklessly tests its properties, only to find, that it could lead to his death. Elsewhere, an entity threatens the city.
104	"Thirty-Eight Minutes"	July 30, 2004
Needing medical attention, Sheppard's puddle jumper races to Atlantis, only to become lodged in the Stargate. Now, they only have 38 minutes until the stargate automatically dis-engages, and the jumper gets cut in two... leaving them to suffocate in outer space.
105	"Suspicion"	August 6, 2004
When offworld teams are attacked by the Wraith one time too many, Dr. Weir must consider that an Athosian may be a spy, but when an investigation is ordered, all evidence seems to point to Teyla. Feeling unwelcome, the Athosians resettle to the newly-discovered mainland.
106	"Childhood's End"	August 13, 2004
The team visits a world where no one is over 24 years old, because of ritual suicides they believe keep the Wraith at bay. Unbeknownst to them, the Wraith can't attack due to an EM field that renders all technology useless, until the team unwittingly takes the ZPM powering it.
107	"Poisoning the Well"	August 20, 2004
Maj. Sheppard volunteers Beckett to help the Hoffans, an advanced human culture who are developing a vaccine against the Wraith. But the Hoffans are willing to go to any extreme to eliminate their enemy, even if it means the destruction of the majority of their people.
108	"Underground"	August 27, 2004
In order to keep the expedition fed, the team visits the Genii to trade for food. According to Teyla she believed them to be peaceful farmers, however, Sheppard and McKay find an underground bunker, letting them see the real face of the Genii.
109	"Home"	September 10, 2004
When Atlantis discovers a planet that will allow them to gate to Earth, they return under the guise they will be able to go back to the city, due to the new hyperdrive on the Prometheus. Yet when the engines explode, the team begins to question the mystery of their situation.
110	"The Storm (Part 1)"	September 17, 2004
Exploring the planet, Sheppard and Teyla discover colossal storm with the ability to crush the city in its current state. McKay and Zelenka think of a daring way to power up the shield, but it's no coincidence that The Genii invade the city at their weakest moment.
111	"The Eye (Part 2)"	November 8, 2004
While Sheppard attempts to reclaim the city from the Genii, who still have Weir and McKay as hostages, the bulk of the storm is fast approaching. Now, the rest of the team must take drastic measures to help where ever they can, before there is nothing left to save.
112	"The Defiant One"	November 15, 2004
Sheppard and McKay lead two scientists, to survey an Ancient orbital defense platform discovered from the city's sensors. When they arrive via jumper, they also find a Wraith distress beacon emanating from the nearest planet's surface... and are in for an unusual surprise.
113	"Hot Zone"	November 22, 2004
Inspecting the city for storm damage, a party of scientists unleash a virus that causes hallucinations and eventually... death. Now, nearly a third of Atlantis' residents have been infected, forcing a lockdown. It's up to Sheppard to keep it from spreading, and eliminate it for good.
114	"Sanctuary"	November 29, 2004
Searching a new planet, the Wraith find the team, only for them to be shot down by a mysterious weapon. On the surface, they find a primitive world that would make ideal sanctuary for those fleeing from the Wraith, but the inhabitants believe their goddess won't permit it.
115	"Before I Sleep"	December 6, 2004
While exploring the city, the team stumbles upon a stasis unit holding an extremely old woman, who they believe to be an Ancient. When they revive her, she claims to be Dr. Elizabeth Weir, and she has a story she's been waiting ten-thousand years to tell.
116	"The Brotherhood"	January 3, 2005
The team searches for a Zero Point Module rumored to be hidden on the planet Dagan. In attempt to locate and excavate the ZPM, the team crosses paths with Kolya once more, but it's not the only thing to worry about when their new allies have motives of their own.
117	"Letters from Pegasus"	January 10, 2005
With the Wraith fast approaching to claim the city, Atlantis must somehow send a message back to Earth for a desperate attempt in survival. Meanwhile, Sheppard and Teyla go offworld to try to find more intel on the Wraith fleet, but end up with a few hitchhikers.
118	"The Gift"	January 17, 2005
Plagued by terrifying nightmares, Teyla tries to dive into her past offworld, where she finds an abandoned Wraith lab. Bringing back the findings, Dr. Beckett makes a surprising discovery in her DNA makeup, leading to a possible way to gather information from their enemy.
119	"The Siege (Part 1)"	January 24, 2005
McKay leads a team to activate the Ancients' orbital weapons platform to destroy the hive ships on the final stretch to the city. Meanwhile, the city's personnel are preparing for evacuation, when they discover the kamikaze dart pilot (The Brotherhood) has survived in the city.
120	"The Siege (Part 2)"	January 31, 2005
As a response to the message the expedition sent, the SGC sends Atlantis reinforcements via ZPM. Now the Ancient power source is en route through the latest Earth battleship the Daedalus, and they need to hold out for four days, or the Lost City could be lost... forever.

Season 2

The story continues when the Daedalus arrives and renews the expedition's connection to Earth. This takes place alongside the Ori story arc in SG-1, and the Wraith become an even larger threat in the Pegasus Galaxy. But what they deal with in their second year might be more than they can handle, and Dr. Beckett's retrovirus is more trouble than it's worth.

Ep#	Title	Original airdate
2x01	"The Siege (Part 3)"	July 15, 2005
The timely arrival of the Daedalus, lead by Col. Steven Caldwell, saves Maj. Sheppard's life from a suicide bombing run, but it may not be enough to defeat the Wraith when more hive ships are on the way. Thankfully with the new ZPM, McKay might pull off another miracle.
2x02	"The Intruder"	July 22, 2005
Strange malfunctions begin to occur when members of the expedition return from a trip to Earth aboard the Daedalus. When things go too far, they discover that the ship has been infected by a Wraith virus, and now it has the instinct to stay alive, even if it means it has to kill.
2x03	"Runner"	July 29, 2005
Following a lead on the whereabouts of Lt. Ford, Lt. Col. Sheppard and Teyla get captured by Ronon Dex, a man who they find out is a runner, hunted by the Wraith. When they offer to help, the team must face off against their old ally, and possibly gain a new one.
2x04	"Duet"	August 5, 2005
The team witnesses the aftermath of a culling, only for a run-in with a Wraith Dart to ruin the party. When it's shot down to preserve Atlantis' secret, they discover that their drastic measures have left the consciousness of a precocious Atlantis security officer trapped in Dr. McKay.
2x05	"Condemned"	August 12, 2005
Sheppard's team stumbles upon a technologically advanced society that purposely leaves their criminals on a penal colony near the Stargate, for the Wraith to discover them first. But after the prisoners shoot the jumper down, they discover things aren't so clear cut.
2x06	"Trinity"	August 19, 2005
After having found an experimental Ancient power generator, McKay becomes obssesed to triumph where the Ancients failed, but the price might be too high. Elsewhere, Teyla and Ronon go to the planet Balkan to trade, but discover that not all of Ronon's people died.
2x07	"Instinct (Part 1)"	August 26, 2005
While investigating a planet, the team comes across a Wraith girl who has been raised by her human "father," hiding from the people of the nearby village in fear of her life. But she doesn't consider the consequences when she takes an incomplete drug to turn herself human.
2x08	"Conversion (Part 2)"	September 9, 2005
After Ellia injects him with the retro-virus (Instinct), the Atlantis team races against time to find a way to reverse Sheppard's transformation into an Iratus bug hybrid. But even though Sheppard might make it difficult for them, he could be the key to his own salvation.
2x09	"Aurora"	September 23, 2005
The team finds an Ancient warship still inhabited Ancients in suspended animation. They are all connected together through a virtual environment, that Sheppard enters to communicate with them. The only problem being, the Ancients think that their virtual lives are reality.
2x10	"The Lost Boys (Part 1)"	September 23, 2005
Sheppard's team is kidnapped off-world, only to find that their captor is none other than Ford. He has recruited several men into taking the Wraith enzyme, and now they intend to use the team to destroy a Hive Ship to prove the "glorious" effects of the drug.
2x11	"The Hive (Part 2)"	November 21, 2005
After the attempt to destroy the Hive backfires, the team becomes captured by the Wraith, demanding answers. Meanwhile, Dr. McKay takes a massive dose of enzyme and escapes to Atlantis in a state of frenzy, but his choice could put him on the edge of death.
2x12	"Epiphany"	November 28, 2005
Sheppard gets pulled into an Ancient device, separating him from the rest of his team and the outside world. While trying to get him out, the team discovers that time moves much more quickly inside and Sheppard could die of old age before they release him.
2x13	"Critical Mass"	December 5, 2005
It is discovered that The Trust have infiltrated Atlantis and planted a bomb inside, set to go off the next time they dial Earth. To add to the tension, two Wraith cruisers are on the way, and Dr. Weir wants to figure out if there could be a Goa'uld spy in Atlantis' midst.
2x14	"Grace Under Pressure"	December 12, 2005
During the test run of a recently repaired puddle jumper, it crashes deep into the ocean, leaving Dr. McKay sinking underwater. When he shows the first signs of losing hope (and sanity), he must rely on a hallucination of Lt. Col. Samantha Carter for his survival.
2x15	"The Tower"	December 19, 2005
The team finds a world that possesses Ancient technology, but only the royal family may be allowed to operate it and lowly villagers are treated with little dignity. When he tries to set things right, Sheppard finds himself a pawn in the rivalry between the heirs to the throne.
2x16	"The Long Goodbye"	January 2, 2006
After recovering two alien stasis pods from space, the minds of the inhabitants are transferred into Dr. Weir and Sheppard. But when it's discovered that the two are enemies hoping to settle an ancient score, the alien combatants put the entire population of Atlantis in danger.
2x17	"Coup D'etat"	January 9, 2006
Ladon Radim comes to the expedition wanting to overthrow the Genii leader, Cowen. They are reluctant to help, but it seems he has discovered a ZPM that he could trade with the expedition. Later, Radim's true motives are revealed... for the time being.
2x18	"Michael"	January 16, 2006
An amnesiac young Lieutenant in Atlantis, Michael Kenmore, suffers poor treatment from the personnel, and disturbing nightmares that he is a Wraith. Yet things become worse, when he accidentally stumbles upon a shocking discovery about himself... he is one.
2x19	"Inferno"	January 23, 2006
The team comes to aid a civilization taking refuge throughout an Ancient outpost. While trying to repair systems, McKay discovers a volcano below the outpost that will obliterate the entire planet, suggesting evacuation. Yet during the process, the Stargate is destroyed.
2x20	"Allies (Part 1)"	January 30, 2006
A Wraith faction (including Michael) contacts Atlantis to seek help in destroying their common enemies, the Wraith. Because the Wraith are currently engaged in a destructive civil war, they suggest using Atlantis' retro-virus to turn their native foes into human prey.

Season 3

This season concentrates on more character driven stories. Along with new insight on the characters, the expedition discovers a new threat, one that could be the pre-cursor to the Replicators. Some important characters leave the series in this season, and the fate of Atlantis once again is in the hands of the Tau'ri.

Ep#	Title	Original airdate
3x01	"No Man's Land (Part 2)"	July 14, 2006
After the Wraith betrayed the expedition (Allies), they head to Earth with McKay and Ronon. Meanwhile, Elizabeth must answer to the IOA due to her actions during the short-lived alliance, and Sheppard must stop the hive ships from reaching Earth, whatever the cost.
3x02	"Misbegotten (Part 3)"	July 21, 2006
After using the retro-virus to turn an entire hive into humans, they create a Stargate-less colony for them to live until a more permanent solution is found. All the while, Richard Woolsey arrives at Atlantis to observe Dr. Weir to see if she's fit to lead the expedition.
3x03	"Irresistible"	July 28, 2006
The Atlantis team encounters a village that adore one man to the point of insanity. He claims to have medicines to offer the team, but when Beckett investigates, he brings the man back to Atlantis smitten by the man's charm. Soon, the entire expedition falls under his spell.
3x04	"Sateda"	August 4, 2006
When Ronon becomes a prisoner offworld, his captors hand him over to the Wraith, who take him to his homeworld. There, he is forced to once again become their prey, but witness to his capture, Sheppard's team races to Sateda to return him to his new home.
3x05	"Progeny"	August 11, 2006
Weir and the team visit an advanced civilization that split off from the Lanteans thousands of years ago, and have built an entire planet out of Ancient technology. But after the Asurans adverse behavior, they soon discover they might not even be Lantean or organic for that matter.
3x06	"The Real World"	August 18, 2006
Dr. Weir awakens in a sanitarium outside of D.C. only to find that Atlantis, and the Stargate Program, was a fantasy. But after a series of nightmarish visions, she doesn't take long to realize things aren't what they appear to be, and she is determined to return to the city.
3x07	"Common Ground"	August 25, 2006
Sheppard is captured by Kolya, who plans to trade him for Ladon Radim. To help persuade Dr. Weir, he uses his captured Wraith to feed off Sheppard over and over again. To escape, Sheppard must find common ground with the only one who wants to achieve the same goal.
3x08	"McKay and Mrs. Miller"	September 8, 2006
On Earth, a young housewife has written a ground-breaking proof that could benefit Atlantis. She is McKay's sister who has given up a career as a scientist to raise a family, and when he persuades her to come to Atlantis, another Rodney comes from an alternate reality.
3x09	"Phantoms"	September 15, 2006
Looking for a lost team, Sheppard and friends stumble upon a Wraith hallucinatory device, and after a few hours of research, McKay deems the device to be too dangerous for everyone. While attempting to leave, the DHD explodes, leaving the team to become victim to the device.
3x10	"The Return (Part 1)"	September 22, 2006
During the first test of the intergalactic bridge, Atlantis discovers an Ancient Warship between two galaxies. When the Ancients return, they want the expedition gone, but back on Earth, their depression lifts into fear when they must find a way return when the Asurans invade.
3x11	"The Return (Part 2)"	November 20, 2006
Major General Jack O'Neill and Richard Woolsey are captured by the Asurans during the raid on the city, leading the team to disobey orders and return to the Pegasus Galaxy reuniting with Teyla and Ronon to retake the city of Atlantis, without destroying it in the process.
3x12	"Echoes"	November 27, 2006
Everyone starts to see ghosts of Lanteans, caused by echoes being emitted by whale-like creatures converging on the city. When side effects begin to occur, McKay discovers that the Ancients tried to teach the whales their language, and now might be trying to warn them.
3x13	"Irresponsible"	December 4, 2006
Lucius Lavin (Irresistible), is up to his old tricks again, he's using an Ancient Personal Shield Emitter (Hide and Seek) to pose as an invincible hero, but needs the team's help when Acastus Kolya shows up to deal with Lavin personally.
3x14	"Tao of Rodney"	December 11, 2006
After an Ancient device within the city alters Rodney's DNA, he gains superhuman powers and, regrettably, a superhuman ego. Although he initially takes it as a blessing, his enhanced brilliance is checked only by his impending death... unless he can learn how to ascend.
3x15	"The Game"	December 18, 2006
Major Lorne's team discovers a planet that fits the description of Lt. Col. Sheppard and Dr. McKay's competitive video game. It turns out that it has been controlling real people through a series of Ancient satellites, who now stand on the brink of war and destruction.
3x16	"The Ark"	January 8, 2007
Colonel Sheppard's team discovers a space station where the last of a race of humans remain. They soon discover, however, the entire population is in danger when the station is damaged through the suicide of a recently awoken resident.
3x17	"Sunday"	January 15, 2007
The expedition tries to relax during a mandatory day off, until an unexpected explosion leaves three people dead, and reveals that one other scientist is a walking time bomb. Unfortunately, the attempt to resolve the issue will result in the loss of an important face in Atlantis.
3x18	"Submersion"	January 22, 2007
The team discovers a drill platform at the bottom of the ocean which may be an alternative to ZPMs, but during their visit, they are ambushed by an old Wraith Queen. Once they capture her, Teyla's desire to get information could lead her down a dangerous path.
3x19	"Vengeance"	January 29, 2007
Now that the Wraith see Michael as an "unclean thing," he has been experimenting with Iratus bugs, creating monsters for an army to rule the galaxy. When the team stumbles on one of his labs, they are in for a world of hurt when they are attacked by countless creatures.
3x20	"First Strike (Part 1)"	February 5, 2007
When the Apollo arrives, they launch a preemptive strike against the Asurans when it is discovered they are building a fleet of ships. When the armada is destroyed, a weapons satellite appears, and unless they can fly the city away from Lantea, Atlantis will be no more.

Season 4

Template:Future television Amanda Tapping (Lt. Col. Samantha Carter) joins the cast (as a regular cast member) for 14 episodes, Jewel Staite (Dr. Jennifer Keller) will be a recurring character for eight episodes, while regular cast member Torri Higginson (Dr. Weir) will become a recurring cast member for four episodes. Stargate Atlantis will start Sept. 28 as announced by the SCI FI channel, but due to SCI FI fluctuations in premier times this may change nearer the premier date, but it has been confirmed by Joseph Mallozzi's blog that episodes will air on the SCI FI channel first.

Ep#	Title	Original airdate
4x01	"Adrift (Part 2)"	September 28, 2007
After flying away from Lantea trying to escape an Asuran weapons satellite, the star drive shuts down without warning, leaving 24 hours of power left. But the conflict is far from over when the replicators hunt them down in deep space... with Oberoth at the helm.
4x02	"Lifeline (Part 3)"	TBA 2007
No summary available yet.
4x03	"Reunion"	TBA 2007
When the team stumbles upon Ronon's old companions, they tell how they survived when Sateda fell. Sheppard is reluctant to bring the Satedans to Atlantis, causing Ronon to decide whether to stay or to live with his former allies, who harbor dark secrets on how they really survived.
4x04	"Doppelganger"	TBA 2007
After coming across a crystalline species similar to one Jack O'Neill encountered ten years ago, Sheppard is duplicated, and his clone returns to Atlantis in his stead, bent on destroying the entire expedition by invading their nightmares.
4x05	"Travelers"	TBA 2007
Sheppard is captured by a race of humans that have lived for generations in space to avoid any Wraith contact, and have heard of rumors about a powerful enemy against the Wraith, the Atlantis Expedition. Now they intend to use Sheppard to activate an Ancient Warship.
4x06	"Tabula Rasa"	TBA 2007
A deadly disease courses through Atlantis, causing the majority of the expedition to lose their memories.
4x07	"Missing"	TBA 2007
No summary available yet.
4x08	"The Seer"	TBA 2007
The team comes across Davos, a man who can see into the future. He brings news that Hive Ships are on the way, but McKay sees this as an opportunity, since he turned the Asurans on after the Wraith shut them down. Now, Carter must decide the information to be valid.
4x09	"Miller's Crossing"	TBA 2007
Jeannie Miller becomes kidnapped by Henry Wallace on Earth, after Wallace determines that only she and her brother can save his child’s life using nanotechnology. McKay comes to the rescue, but inadvertently gets captured too, and the two must prevent his daughter's death.
4x10	"This Mortal Coil (Part 1)"	TBA 2007
This will be the first episode of a mid-season three-parter of Atlantis's fourth season. No summary available yet.
4x11	"Be All My Sins Remember'd (Part 2)"	TBA 200?
The team uses a captured Wraith as an ally to fight a common enemy. With his help, they hope to recruit a fleet of Hive ships to complete their mission, unfortunately, not as many ships flock to the cause, and the expedition might cause a war that they won't be able to contain.
4x12	"Spoils of War (Part 3)"	TBA 200?
This will be the third episode of a mid-season three-parter of Atlantis's fourth season. No summary available yet.
4x13	"Quarantine"	TBA 200?
An imposed lockdown of the Ancient city of Atlantis threatens to challenge various relationships that are spread out through the entire expedition.
4x14	" The Kindred (Part 1)"	TBA 200?
This marks the brief return of Dr. Carson Beckett, but has no specific order at this time.
4x15	"The Kindred (Part 2)"	TBA 200?
This continues the brief return of Dr. Carson Beckett, but has no specific order at this time.
4x16	"Midway"	TBA 200?
This will be an episode of Atlantis's fourth season, but has no specific order at this time. No summary available yet.

See also

• List of Stargate SG-1 episodes
• Timeline of Stargate