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HomeStargate Atlantis Episode Reference
A short description of each Stargate Atlantis episode, for reference.
Unless otherwise noted, all information is provided by GateWorld.
See Also
• Stargate SG-1
Episodes and Movies List
• Stargate
Universe Episode List
Season One
1.01 "Rising, Part 1"
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.
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1.02 "Rising, Part 2"
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.
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1.03 "Hide and Seek"
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.
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1.04 "Thirty Eight Minutes"
The team finds themselves in mortal danger when their Puddle
Jumper ship becomes lodged in the Stargate.
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1.05 "Suspicion"
After a series of run-ins with the Wraith, the team begins to
suspect their Athosian allies of having a spy in their midst.
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1.06 "Childhood's End"
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.
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1.07 "Poisoning the Well"
The team finds a world whose people are on the brink of a
discovery that may make them immune to the Wraith feeding.
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1.08 "Underground"
Efforts to open trade relations with a species called the Genii
turn sour when the team discovers their new "allies" have ulterior
motives.
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1.09 "Home"
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.
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1.10 "The Storm"
When a massive storm threatens the city, Atlantis is evacuated
-- only to be taken over by the team's newest enemy.
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1.11 "The Eye"
Major Sheppard plays a dangerous game of cat and mouse with
soldiers who have seized control of Atlantis and taken Weir and
McKay hostage.
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1.12 "The Defiant One"
Sheppard's team investigates a downed Wraith ship, and find
themselves stuck on a planet with a lone Wraith survivor.
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1.13 "Hot Zone"
Nearly a third of Atlantis's residents are infected with a
deadly virus that causes hallucinations and death, forcing a
lockdown of the city.
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1.14 "Sanctuary"
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.
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1.15 "Before I Sleep"
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.
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1.16 "The Brotherhood"
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.
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1.17 "Letters from Pegasus"
With a brief opportunity to send a data transmission to Earth,
members of the Atlantis expedition compose video messages home to
their loved ones.
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1.18 "The Gift"
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.
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1.19 "The Siege, Part 1"
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.
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1.20 "The Siege, Part 2"
A new military contingent from Earth is sent to take command of
Atlantis and defend it from the impending Wraith attack.
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Season Two
2.01 "The Siege, Part 3"
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.
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2.02 "The Intruder"
The Daedalus is infected by a Wraith computer virus, while
members of the expedition hope to return to Earth.
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2.03 "Runner"
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.
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2.04 "Duet"
A run-in with a Wraith Dart leaves the consciousness of a
precocious Atlantis security officer trapped in Dr. McKay's
mind.
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2.05 "Condemned"
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.
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2.06 "Trinity"
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.
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2.07 "Instinct"
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.
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2.08 "Conversion"
Colonel Sheppard begins to undergo a disturbing physical
transformation after being exposed to Beckett's anti-Wraith
drug.
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2.09 "Aurora"
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.
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2.10 "The Lost Boys"
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.
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2.11 "The Hive"
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.
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2.12 "Epiphany"
Sheppard finds himself on a planet where time passes more
rapidly, with no way to contact his team or return to
Atlantis.
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2.13 "Critical Mass"
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.
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2.14 "Grace Under Pressure"
When Dr. McKay is trapped underwater in a sinking Puddle Jumper,
his only chance for survival may be an hallucination of Samantha
Carter.
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2.15 "The Tower"
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.
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2.16 "The Long Goodbye"
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.
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2.17 "Coup D'etat"
After a team from Atlantis goes missing, the expedition finds
itself in the middle of a Genii coup.
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2.18 "Michael"
An amnesiac young Lieutenant in Atlantis suffers from disturbing
nightmares that he is a Wraith, only to make a shocking discovery
about himself.
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2.19 "Inferno"
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.
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2.20 "Allies"
Michael and his Wraith faction arrive at Atlantis to propose an
alliance, hoping to use the retrovirus to transform their Wraith
enemies into prey.
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Season Three
3.01 "No Man's Land"
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.
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3.02 "Misbegotten"
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.
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3.03 "Irresistible"
Sheppard's team meets an obnoxious man who is adored by all
thanks to a secret that he carries -- and who has an unexpected
affect on them.
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3.04 "Sateda"
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.
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3.05 "Progeny"
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.
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3.06 "The Real World"
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.
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3.07 "Common Ground"
Colonel Sheppard finds himself the prisoner of a Genii
commander, along with a desperately hungry Wraith who has been
separated from his hive.
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3.08 "McKay and Mrs. Miller"
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.
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3.09 "Phantoms"
Sheppard and Ronon are influenced by a mind-altering device
created by the Wraith while on a mission to rescue a lost
team.
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3.10 "The Return, Part 1"
The Atlantis expedition is stunned to learn that a ship full of
Ancients is returning to reclaim their lost city.
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3.11 "The Return, Part 2"
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.
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3.12 "Echoes"
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.
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3.13 "Irresponsible"
The team finds Lucius Lavin manipulating the people of another
hapless planet, using Ancient technology to pose as an invincible
hero.
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3.14 "Tao of Rodney"
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.
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3.15 "The Game"
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.
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3.16 "The Ark"
The team discovers the last of a civilization in suspended
animation, whose survival is at risk when their station is
critically damaged.
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3.17 "Sunday"
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.
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3.18 "Submersion"
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.
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3.19 "Vengeance"
The Atlantis team investigates the disappearance of one of their
allies, only to find an old enemy engineering a race of powerful
monsters.
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3.20 "First Strike"
An unstoppable energy weapon leaves Atlantis under seige after
Earth launches a preemptive attack against the Replicator home
world.
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Season Four
4.01 "Adrift"
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.
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4.02 "Lifeline"
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.
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4.03 "Reunion"
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.
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4.04 "Doppelganger"
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.
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4.05 "Travelers"
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.
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4.06 "Tabula Rasa"
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.
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4.07 "Missing"
During a visit to New Athos, Teyla and Dr. Keller find
themselves on the run from a primitive tribe of warriors.
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4.08 "The Seer"
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.
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4.09 "Miller's Crossing"
Rodney McKay goes in search of his sister on Earth after she is
kidnapped by the head of a powerful corporation.
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4.10 "This Mortal Coil"
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.
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4.11 "Be All My Sins Remember'd"
With a plan to potentially extinguish the Replicator threat, the
Atlantis team must seek an alliance with a fleet of Wraith
ships.
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4.12 "Spoils of War"
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.
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4.13 "Quarantine"
An automated lockdown traps Atlantis personnel in various parts
of the city, each of them hoping the others will come to their
rescue.
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4.14 "Harmony"
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.
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4.15 "Outcast"
While on personal leave on Earth, Sheppard and Ronon learn that
scientists have engineered a human-form Replicator -- who is now on
the loose.
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4.16 "Trio"
McKay, Carter, and Keller are trapped in an underground chamber
while on an off-world mission, with no apparent means of
escape.
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4.17 "Midway"
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.
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4.18 "The Kindred, Part 1"
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.
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4.19 "The Kindred, Part 2"
The team is shocked when an old friend, believed to be dead,
miraculously returns to them. Teyla plans an escape from Michael's
captivity.
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4.20 "The Last Man"
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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Season Five
5.01 "Search and Rescue"
After a conflict with Michael leaves several Atlantis personnel
trapped, Colonel Carter leads a rescue mission -- unaware that
Michael is still nearby.
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5.02 "The Seed"
When an alien organism incapacitates Dr. Keller, the team seeks
help from an old friend recently revived from stasis.
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5.03 "Broken Ties"
Ronon once again comes face-to-face with Tyre, one of his people
who became a Wraith worshiper -- but who now claims he has broken
free of their influence.
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5.04 "The Daedalus Variations"
The team boards the Daedalus when it shows up abandoned in
orbit, only to find themselves skipping through parallel
universes.
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5.05 "Ghost in the Machine"
The city of Atlantis becomes host to the minds of disembodied
Replicators, led by someone very close to the team.
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5.06 "The Shrine"
Rodney McKay is stricken with a mental affliction that robs him
of his knowledge and memories, causing him to revert to a childlike
state.
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5.07 "Whispers"
Sheppard and Beckett join a team investigating a hidden Wraith
laboratory where Michael has been conducting genetic
experiments.
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5.08 "The Queen"
Teyla goes in disguise as a Wraith queen when Todd agrees to
make a bold proposal to the leader of his alliance -- not realizing
that he has other intentions.
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5.09 "Tracker"
Ronon and McKay join Dr. Keller on an off-world errand of mercy,
and must track her through the forest when a Runner kidnaps
her.
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5.10 "First Contact"
When Daniel Jackson visits Atlantis, he and Dr. McKay discover a
hidden lab that brings a new enemy knocking. The Daedalus welcomes
a Wraith ally for a special project.
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5.11 "The Lost Tribe"
Sheppard races to an Ancient laboratory to save McKay and Daniel
Jackson before Todd arrives to destroy a weapon that has a
devastating side-effect. Daniel uncovers the identity of the
hostile new species.
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5.12 "Outsiders"
The Wraith arrive in a village where Dr. Beckett is working, and
demand that the locals turn over a group of refugees who survived
the Hoffan plague -- or the entire village will be
obliterated.
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5.13 "Inquisition"
A new coalition of human worlds puts the Atlantis team on trial
for their alleged crimes against the Pegasus Galaxy.
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5.14 "The Prodigal"
The team fights to retake control of Atlantis when Michael
infiltrates the control room to take Teyla's child and destroy the
city.
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5.15 "Remnants"
While being evaluated by the I.O.A. Richard Woolsey meets a
beautiful scientist new to Atlantis, who is not what she appears.
Sheppard is captured and tortured by an enemy he thought was
dead.
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5.16 "Brain Storm"
Rodney returns to Earth with Jennifer to witness the triumph of
his rival, who believes he has solved the problem of global
warming. But when the new technology goes horribly awry, Rodney
must help shut down the deadly weather device.
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5.17 "Infection"
After Todd's hive ship shows up over Atlantis transmitting a
distress call, the team discovers that he and his crew have been
stricken with a disease they helped create.
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5.18 "Identity"
Dr. Keller's body is taken over by a cunning thief, while Keller
finds herself imprisoned with a death sentence on another
planet.
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5.19 "Vegas"
In the city of Las Vegas, Detective John Sheppard must solve the
case on a long string of unusual murders -- perpetrated by a Wraith
in hiding.
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5.20 "Enemy at the Gate"
The team learns that a rogue Wraith has acquired several Z.P.M.s
to power a formidable new hive ship -- and he is headed for
Earth.
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