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S5 E20 · Enemy at the Gate
Stargate Atlantis is a sci-fi & fantasy and action & adventure TV series that premiered on Syfy on July 15, 2004. It has 5 seasons and 100 episodes so far and has ended. The latest episode, Season 5 Episode 20 "Enemy at the Gate", aired on January 8, 2009.
With the Ancients' city of Atlantis discovered in the Pegasus Galaxy by Stargate Command, Dr. Elizabeth Weir and Major Sheppard lead a scientific expedition to the ancient abandoned city. Once there, the team not only find themselves unable to contact Earth, but their explorations unexpectedly reawaken the Ancients' deadly enemies, The Wraith, who hunger for this new prey. Now with the help of newfound local allies like Teyla Emmagan, the Atlantis Team sets about to uncover their new home's secrets even as their war of survival against the Wraith begins.
Last updated
100 episodes · 5 seasons
2004 · 20 episodes · Last episode: 21 years ago
The Atlantis expedition team, led by Dr. Elizabeth Weir, arrives in the Pegasus Galaxy and discovers the lost city of Atlantis. They encounter a powerful new enemy, the Wraith, and face various challenges to protect their new home while exploring the galaxy and seeking new allies.
Stargate Atlantis Season 1 release dates →
E20
All hope seems lost, until Colonel Everett arrives suddenly from Earth. He is determined to defend the city until the arrival of a ZPM, brought by a new ship.
E19
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 weapons platform.
E18
Plagued by terrifying nightmares, Teyla begins to recall a time when she and her father were captured by the Wraith and subjected to disturbing experiments.
E17
Given a brief opportunity to send a data transmission to Earth, members of the Atlantis expedition compose video messages home to their loved ones.
E16
The team searches for a valuable Zero Point Module rumored to be hidden on the planet Dagan. But their new allies have motives of their own.
E15
A woman is found in suspended animation in Atlantis, and the team is shocked to see that it is Dr. Weir herself, who tells them of her trip 10,000 years into the city's past.
E14
The team finds a paradise world that would make an ideal sanctuary for those fleeing from the Wraith, but the local inhabitants believe their goddess will not permit it.
E13
Nearly a third of Atlantis's residents are infected with a deadly virus that causes hallucinations and death, forcing a lockdown of the city.
E12
Sheppard's team investigates a downed Wraith ship, and find themselves stuck on a planet with a lone Wraith survivor.
E11
Major Sheppard plays a dangerous game of cat and mouse with soldiers who have seized control of Atlantis and taken Weir and McKay hostage.
E10
When a massive storm threatens the city, Atlantis is evacuated, only to be taken over by the team's newest enemy.
E9
McKay's efforts to harness the energy of an alien planet's atmosphere allows for a return trip to Earth -- but the team may not be able to return to Atlantis.
E8
Efforts to open trade relations with a species called the Genii turn sour when the team discovers their new "allies" have ulterior motives.
E7
The team finds a world whose people are on the brink of a discovery that may make them immune to the Wraith feeding.
E6
Sheppard and the team visit a world where no one is over 24 years old -- because of a ritual suicide practice they believe keeps the Wraith at bay.
E5
After a series of run-ins with the Wraith, the team begins to suspect their Athosian allies of having a spy in their midst.
E4
The team finds themselves in mortal danger when their Puddle Jumper ship becomes lodged in the Stargate.
E3
The Atlantis base is threatened when the team discovers that an alien entity is in the city. McKay's experiment with alien technology goes awry.
E2
Sheppard tries to convince Weir to mount a rescue mission to free Colonel Sumner, Teyla, and the others captured by the Wraith.
E1
A new Stargate team embarks on a dangerous mission to a distant galaxy, where they discover a mythical lost city -- and a deadly new enemy.
2005 · 20 episodes · Last episode: 20 years ago
As the Wraith threat intensifies, the team strives to find ways to defend Atlantis and the Pegasus Galaxy from impending invasion. Key episodes focus on breakthroughs in ancient technology, dangerous alliances, and a desperate search for a means to stop their enemies once and for all.
Stargate Atlantis Season 2 release dates →
E20
Michael and his Wraith faction arrive at Atlantis to propose an alliance, hoping to use the retrovirus to transform their Wraith enemies into prey.
E19
Sheppard's team meets a civilization about to be destroyed by a super-volcano, and is trapped there when the Stargate is destroyed during the evacuation.
E18
An amnesiac young Lieutenant in Atlantis suffers from disturbing nightmares that he is a Wraith, only to make a shocking discovery about himself.
E17
After a team from Atlantis goes missing, the expedition finds itself in the middle of a Genii coup.
E16
The team discovers two pods that contain the minds of alien beings, who take control of Weir and Sheppard's bodies to continue their personal war.
E15
The team finds a world that possesses Ancient defense technology, where Colonel Sheppard finds himself a pawn in the rivalry between the heirs to the throne.
E14
When Dr. McKay is trapped underwater in a sinking Puddle Jumper, his only chance for survival may be an hallucination of Samantha Carter.
E13
When an operative of the Trust plants a bomb in Atlantis, the team must find a spy within their own ranks before the Wraith arrive and discover the city.
E12
Sheppard finds himself on a planet where time passes more rapidly, with no way to contact his team or return to Atlantis.
E11
Colonel Sheppard and his team find themselves prisoners of the Wraith following Ford's attack on a hive ship. Dr. McKay goes to great lengths to help them.
E10
The team is captured by the missing Lieutenant Ford, who is now leading a group of young men who are taking the Wraith enzyme -- and who wants the team's help in a suicide attack against a hive ship.
E9
When the team finds an Ancient warship adrift on the edge of the galaxy, its crew still alive, Colonel Sheppard enters their virtual reality stasis to communicate with them.
E8
Colonel Sheppard begins to undergo a disturbing physical transformation after being exposed to Beckett's anti-Wraith drug.
E7
The team discovers a young Wraith girl who has been raised by a human, and is in hiding from the people of her human village in fear of her life.
E6
McKay puts the team at risk when he tries to perfect unfinished Ancient technology that wiped out a civilization. Ronon Dex discovers that he is not the lone survivor from his world.
E5
The Atlantis team finds a culture that lives in relative safety from the Wraith, because they hand over their criminals to the Wraith -- and crash-land in the volatile penal colony.
E4
A run-in with a Wraith Dart leaves the consciousness of a precocious Atlantis security officer trapped in Dr. McKay's mind.
E3
Sheppard and his team attempt to locate Lieutenant Ford, only to find themselves captives of a former soldier who is being hunted by the Wraith.
E2
The Daedalus is infected by a Wraith computer virus, while members of the expedition hope to return to Earth.
E1
The Daedalus arrives to defend Atlantis from the Wraith onslaught, but it may not be enough when the team discovers that an even larger armada is on the way.
2006 · 20 episodes · Last episode: 19 years ago
The team faces escalating conflicts with both old and new adversaries, including the Wraith and a deadly new faction. The discovery of a potential game-changing technology introduces new ethical dilemmas, while relationships within the team are tested under growing pressures.
Stargate Atlantis Season 3 release dates →
E20
An unstoppable energy weapon leaves Atlantis under siege after Earth launches a preemptive attack against a very powerful enemy's homeworld.
E19
The Atlantis team investigates the disappearance of one of their allies, only to find an old enemy engineering a race of powerful monsters.
E18
The team discovers an Ancient drilling station deep beneath the surface of the ocean, only to find that a Wraith queen is still alive there.
E17
The team tries to relax during a mandatory day off, until an explosion leaves three people dead -- and reveals that one scientist is a walking time bomb.
E16
The team discovers the last of a civilization in suspended animation, whose survival is at risk when their station is critically damaged.
E15
Sheppard and McKay discover that their competitive video game has been controlling a planet of real people, who now stand on the brink of war.
E14
After an Ancient device gives Rodney superhuman powers, his enhanced brilliance is checked only by his impending death -- unless he can learn how to ascend.
E13
The team finds Lucius Lavin manipulating the people of another hapless planet, using Ancient technology to pose as an invincible hero.
E12
The inhabitants of Atlantis begin to suffer ill effects when the planet's whale population begins migrating to the island city, bringing an unexpected harbinger of doom.
E11
The Atlantis team goes against orders to try and save Atlantis from Replicator control -- and to rescue General O'Neill and Richard Woolsey, who are trapped in the occupied city.
E10
The Atlantis expedition is stunned to learn that a ship full of Ancients is returning to reclaim their lost city.
E9
Sheppard and Ronon are influenced by a mind-altering device created by the Wraith while on a mission to rescue a lost team.
E8
Rodney McKay is reunited with his estranged sister back on Earth, who has given up a brilliant career as a scientist to raise a family.
E7
Colonel Sheppard finds himself the prisoner of a Genii commander, along with a desperately hungry Wraith who has been separated from his hive.
E6
Elizabeth Weir wakes up in a mental institution, where she is told that the expedition to Atlantis and the Stargate are figments of her imagination.
E5
Weir and the team visit an advanced civilization that split off from the Lanteans thousands of years ago, but discover that they may not have left Atlantis in peace.
E4
Ronon Dex is captured by the Wraith and returned to his homeworld, where he is haunted by his past as he is forced to once again become their prey.
E3
Sheppard's team meets an obnoxious man who is adored by all thanks to a secret that he carries -- and who has an unexpected effect on them.
E2
The Atlantis team must decide the fate of a colony of Wraith they have turned into humans. Dr. Weir must defend her leadership when she is evaluated by the I.O.A.
E1
The team desperately attempts to stop two Wraith hive ships from reaching Earth. Sheppard must rely on an old foe to rescue McKay and Ronon.
2007 · 20 episodes · Last episode: 18 years ago
With changes in leadership and new allies, the team continues to battle the Wraith and confront new existential threats. Personal dynamics shift as members struggle with loss and make significant choices that shape the fate of Atlantis and its mission in the Pegasus Galaxy.
Stargate Atlantis Season 4 release dates →
E20
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.
E19
The team is shocked when an old friend, believed to be dead, miraculously returns to them. Teyla plans an escape from Michael's captivity.
E18
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.
E17
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.
E16
McKay, Carter, and Keller are trapped in an underground chamber while on an off-world mission, with no apparent means of escape.
E15
While on personal leave on Earth, Sheppard and Ronon learn that scientists have engineered a human-form Replicator -- who is now on the loose.
E14
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.
E13
An automated lockdown traps Atlantis personnel in various parts of the city, each of them hoping the others will come to their rescue.
E12
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.
E11
With a plan to potentially extinguish the Replicator threat, the Atlantis team must seek an alliance with a fleet of Wraith ships.
E10
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.
E9
Rodney McKay goes in search of his sister on Earth after she is kidnapped by the head of a powerful corporation.
E8
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.
E7
During a visit to New Athos, Teyla and Dr. Keller find themselves on the run from a primitive tribe of warriors.
E6
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.
E5
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.
E4
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.
E3
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.
E2
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.
E1
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.
2008 · 20 episodes · Last episode: 17 years ago
As Atlantis faces its greatest threats yet, the team must rely on unexpected alliances and new technologies to safeguard their city and the galaxy. The season builds toward a climactic confrontation that tests the strength, ingenuity, and resolve of the entire expedition.
Stargate Atlantis Season 5 release dates →
E20
"Todd" informs the Atlantis expedition that a rogue group of Wraith has acquired several Zero Point Modules to power a Super-hive, and wants it destroyed. However, after the Daedalus is disabled, they learn that the ship is heading straight for Earth, and they must stop it before it gets there.
E19
In the city of Las Vegas in an alternate reality, police Detective John Sheppard investigates a series of bizarre murders where each body appears to have desiccated. He is soon called to Area 51, where Dr. Rodney McKay explains the situation.
E18
Dr. Jennifer Keller's body is inadvertently taken over by a cunning thief, Neeva Casol. While Neeva tries to escape Atlantis, Keller finds herself imprisoned with a death sentence on another planet, forcing the team into a race against time to return Keller to her original body before she is put to death.
E17
After a Wraith Hive Ship shows up over Atlantis transmitting a distress call, Lt. Colonel John Sheppard's team discovers that its crew has been stricken with a disease they helped create.
E16
Dr. Rodney McKay reluctantly returns to Earth to witness the triumph of his rival Dr. Malcolm Tunney, but must help shut down a deadly weather device when the new technology goes horribly awry.
E15
While being evaluated by the International Oversight Advisory, Richard Woolsey meets a beautiful scientist new to Atlantis, who is not what she appears. Meanwhile, Lt. Colonel John Sheppard is captured and tortured by an enemy he thought he'd killed several years ago: his sworn enemy, Genii Commander Acastus Kolya.
E14
Michael Kenmore has infiltrated Atlantis with an army of his Hybrids, and closes off Stargate Operations and the surrounded levels to prevent anyone from taking it back. His plan; take Teyla Emmagan and her child to perfect his Hybrids, and to destroy the base when they're done. Meanwhile, Lt. Colonel John Sheppard, Dr. Rodney McKay and a team try to take back the city before Michael leaves with what he wants.
E13
Lt. Colonel John Sheppard's team is invited by the Coalition of Planets in order to form an alliance. However, the team is misled and is faced to stand trial, for their alleged crimes against the Pegasus galaxy. Their best chance of freedom, is the experiences of Richard Woolsey.
E12
Dr. Carson Beckett, now a traveling doctor in Pegasus comes across a planet, where some of the villagers are refugees from Balar, a planet infected with the Hoffan drug, and destroyed by the Wraith. However, the Wraith arrive on the planet and gives the village an ultimatum, hand over the Balarians, or face destruction of the entire civilization.
E11
As Dr. Rodney McKay and Dr. Daniel Jackson is held prisoner by the Vanir, they make a startling discovery about who they really are. Meanwhile, "Todd" and his Wraith hijack the Daedalus to find and destroy those who activated the Attero device. The Travelers arrive and Lt. Colonel John Sheppard must help them get to the planet before "Todd" uncovers a way to discover the device for good, even if it means sacrificing McKay and Jackson's lives to do so.
E10
Dr. Daniel Jackson arrives in Atlantis to investigate a hidden lab left behind by the rogue Ancient scientist Janus. Their discovery has attracted the attention of a mysterious group of aliens, who infiltrate the city. Meanwhile, "Todd" and a delegation arrive on the Daedalus to bring forward Dr. Jennifer Keller's gene therapy.
E9
Dr. Jennifer Keller is kidnapped by a runner named Kiryk. While Dr. Rodney McKay and Ronon Dex tracks them, Kiryk takes Keller to a seriously injured young girl. She must do it fast, since the Wraith have found him, and are hunting them down.
E8
The Atlantis expedition has a plan to remove the Wraith's dependence on feeding to use an experimental gene therapy from Michael's database. However, in order to convince the Primary, the Wraith leader, Teyla Emmagan must pose as a Hive Queen.
E7
Dr. Carson Beckett is called in to help a team investigating a lab that once belonged to Michael Kenmore. But soon, they realize that a group of experiments that even Michael couldn't control are hellbent on killing the team.
E6
Dr. Rodney McKay is infected with the Pegasus equivalent of Alzheimer's disease, known as Second Childhood, a common illness among the elderly in the galaxy. The only way to save him is a shrine on Talus. The downside is that it has turned into a Wraith outpost.
E5
While on a mission, Lt. Colonel John Sheppard's team inadvertently brings a mysterious entity to Atlantis. They soon learn that the entity is nothing more than Dr. Elizabeth Weir, who was thought to have been killed after her capture by the Asurans.
E4
The Atlantis expedition mysteriously finds the Daedalus, abandoned and drifting in space. When Lt. Colonel John Sheppard's team come to investigate, the ship mysteriously disappears. They soon discover that the ship is actually an alternate Daedalus from a Alternate reality, and the team must find a way back to their Universe or risk being stranded forever in an unfamiliar reality.
E3
Ronon Dex is captured by Tyre, who wants to hand him to the Wraith in order to maintain his role in their circle. However, when the deal turns sour, and Tyre is left for dead, the Atlantis expedition persuade him to take back their friend. Meanwhile, The Wraith turn Ronon into a Wraith worshipper.
E2
When a mysterious alien organism takes Dr. Jennifer Keller as its host, the newly revived Dr. Carson Beckett and the crew desperately search for a serum to save her from the evolving intruder before it can infiltrate Atlantis. In the meantime, Richard Woolsey officially joins the team, having been chosen as Colonel Samantha Carter's replacement to lead the Atlantis expedition.
E1
Lt. Colonel John Sheppard and his team are trapped under the rubble of Michael's facility in order to rescue Teyla Emmagan. As Colonel Samantha Carter launches a team to rescue the rescuers, little do they know that Michael Kenmore is also searching the planet for the survivors.
Created by Robert C. Cooper and Brad Wright
Amanda Tapping
Samantha Carter
Jewel Staite
Jennifer Keller
Robert Picardo
Richard Woolsey
Torri Higginson
Elizabeth Weir
Rainbow Sun Francks
Aiden Ford
Paul McGillion
Carson Beckett
David Nykl
Radek Zelenka
Christopher Judge
Teal'c
Nicole De Boer
Dr. Alison Porter
Gary Jones
Walter Harriman
Jerry Penacoli
Genii Warrior
Alexandra Carter
Linor
Mike Dopud
Kiryk
Kari Wührer
Nancy Sheppard
Laura Harris
Nola
Chelan Simmons
Mara
Stargate Atlantis has ended, so no new episodes are scheduled. The final episode aired on January 8, 2009.
The most recent episode of Stargate Atlantis, Season 5 Episode 20 "Enemy at the Gate", aired on January 8, 2009.
Stargate Atlantis has 5 seasons with 100 episodes in total.
Stargate Atlantis first aired on Syfy on July 15, 2004.
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