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- TV Show Ended -
There is no Next Episode of Stargate Atlantis planned.
The Stargate SG-1 team discovers what they believe to be the remnants of the lost city of the Ancients – the originators of the Stargates and Stargate Command launches an investigation to find the mythical city of Atlantis. Situated in the distant Pegasus Galaxy, it's farther than any Stargate team has ever traveled. With only enough power to make a one-way trip, a new team, headed by civilian Dr. Elizabeth Weir, is formed and travels through the gate to this unknown galaxy. There, they discover the marvels of the lost city of Atlantis…. and encounter a sinister new enemy.
The Stargate SG-1 team discovers what they believe to be the remnants of the lost city of the Ancients – the originators of the Stargates and Stargate Command launches an investigation to find the mythical city of Atlantis. Situated in the distant Pegasus Galaxy, it's farther than any Stargate team has ever traveled. With only enough power to make a one-way trip, a new team, headed by civilian Dr. Elizabeth Weir, is formed and travels through the gate to this unknown galaxy. There, they discover the marvels of the lost city of Atlantis.... and encounter a sinister new enemy.
Dr. Rodney McKay undergoes experimental gene therapy, altering his DNA to match the Ancient genetic coding. The experiment opens up countless scientific possibilities, as well as an unexpected problem. Meanwhile, during a game of hide and seek, one of the Athosian children inadvertently opens a containment unit that lets loose a seemingly harmless black ethereal cloud. But when Atlantis goes through a series of technical malfunctions, they realize that the shadowy creature is actually feeding off of the power supply!
Fleeing from a surprise encounter with the Wraith, Major Sheppard falls victim to an alien symbiote which is feeding off his life force and slowly paralyzing him. While speeding back to Atlantis for medical aid, the team gets trapped halfway through the Stargate when the puddle jumper, damaged in the altercation with the Wraith, suffers a mechanical failure. With only thirty-eight minutes before the Stargate shuts down, Lieutenant Ford and Dr. McKay struggle to manually fix the problem. As the clock ticks away, the Atlantis team must come together, or perish in the harsh vacuum of space.
When the Atlantis team is ambushed by the Wraith on a trip off-world, Dr. Weir begins to suspect that one of the Athosians is actually a Wraith spy. Gate travel is suspended until both parties are separated to different areas of Atlantis. But on their first mission back through the gate, Teyla disappears and the Atlantis team is once again ambushed by the Wraith. With the Athosians secured away from the gate, suspicions rise and tensions increase…could Teyla have been the traitor in their midst all along?
During an exploratory mission, the puddle jumper's electrical systems are knocked out by a massive electromagnetic field and the team is forced to make an emergency landing. They soon encounter a primitive tribe of children who have been untouched by the Wraith for centuries due to the protective force of the electromagnetic field. But the children believe it is their ritual of mandatory suicide at the age of 25 that keeps the enemy at bay, despite the contrary insistence of the Atlantis team. Fearing the "full growns" in their midst will attract the Wraith, the villagers become anxious for their unexpected guests to leave as soon as possible. But to be able to leave, Dr. McKay must first disable the electromagnetic field. In doing so, he unwittingly trips a Wraith silent alarm, leaving the tribe open to attack.
The Atlantis team encounters the Hoffans, a human civilization in the process of rebuilding their society since the last attack of the Wraith. The resilient Hoffans have developed the beginnings of a drug that could potentially make them immune to their enemies. Fearing that the next Wraith culling will come before they are able to complete their tests, the leaders demand that their people be inoculated before the drug can be proven safe. Dr. Beckett argues that there is no way to know what the true effects of the drug will be. Can Beckett make the Hoffans see reason, or has their haste made them blind to the epidemic they may be unleashing upon themselves?
With the city's food supply dwindling, the Stargate Atlantis team must search for an alternate food source. At the suggestion of Teyla, they meet with Cowen, the leader of a simple group of farmers known as the Genii.
Untrusting of outsiders, Cowen is hesitant to agree to any sort of trading. However, he soon changes his tune when Major Sheppard demonstrates the Atlantis team's advanced weaponry, including C-4. His interest piqued, Cowen agrees to supply the Atlantis team with food in exchange for the explosives. Elated, Sheppard and Dr. McKay return to Atlantis to report their success to Dr. Weir, while Teyla and Lieutenant Ford enjoy the Genii's Harvest Ceremony.
However, when Sheppard and Mckay return to the Genii village, they stumble upon technology that leads them to believe the Genii are not at all what they seem.
During an exploration of a planet with no apparent inhabitants, Dr. McKay discovers that the planet's fog-like atmosphere is actually pure energy… enough to open a wormhole back to earth.
Wanting to be sure they could return to Atlantis to continue their mission, Dr. Weir relays a message back to Stargate Command. They are told that the battleship Prometheus has been outfitted with a hyperdrive and they would be able to return to Atlantis within a month!
Back on Earth, the team is overjoyed to be with the things and people they love. However, when the Prometheus' hyperdrive is accidentally destroyed, their hopes of ever returning to Atlantis are suddenly dashed.
The team learns that a storm of catastrophic proportions is headed straight for the city of Atlantis. Without enough energy to power the shields, Dr. Weir orders that Atlantis be evacuated until the storm passes. But Dr. McKay conceives of a last minute plan to save the city – harness the power of the electrical storm to fuel the shields. Meanwhile, unbeknownst to the Atlantis team, the Genii have learned of Atlantis' evacuation, and devise a dangerous plan to take over the city's weapons for themselves. With Weir and McKay taken hostage and Lt. Ford and Teyla aiding the evacuees, it is up to Major Sheppard to shut down the remaining grounding stations and save Atlantis from invasion before the storm hits.
When an approaching storm with awesome destructive capabilities causes Dr. Weir to evacuate the city, the Genii launch an invasion, and take control of Atlantis' weapons. With Dr. Weir and Dr. McKay taken hostage and Major Sheppard fending for himself against the ruthless Genii troops, the rest of the Atlantis team desperately tries to find a way to get back to the city while the storm rages around them.
Leading an exploration of an ancient weapons satellite in deep space, Major Sheppard and Dr. McKay intercept a Wraith distress signal. Deciding to investigate, the team lands on a nearby planet and finds the source of the call - a downed Wraith cargo ship. When the unseen Wraith awakens from hibernation, Sheppard and McKay become the focus of its ravenous appetite.
While assessing the structural damage to the city caused by a massive storm, two of Dr. McKay's team of scientists experience horrifying visions. Minutes later, they drop dead. Retracing the steps of the dead scientists, McKay and his team find an Ancient lab, its contents in disarray. Afraid of a viral outbreak, Dr. Weir places the city under a self-regulated quarantine. Even with the city under lockdown under the threat of a possible viral outbreak, more and more people begin suffering from the same terrifying visions. If McKay cannot find a cure, the entire city will be doomed.
Engaged in combat, the Atlantis team's puddle jumper is hit with an energy wave that leaves them unharmed, but destroys their Wraith attackers. Hoping to find the source of the wave, the team lands on the planet below. There they find a civilization enjoying the utmost health and happiness, untouched by the Wraith. Their leader, Chaya, refuses to allow anyone other than her own people the sanctuary and safety from the Wraith that would be found by settling on their planet. Unwilling to give up so easily, Major Sheppard asks Chaya to reconsider. After thinking it over, Chaya surprises everyone by requesting to accompany them back to Atlantis to discuss the matter further leading the team to suspect they may be caught in a trap.
While exploring the city, the Atlantis team discovers a stasis chamber holding a woman who appears to be over 10,000 years old. Excited at the possibility that she is one of the Ancients, the alien race that built Atlantis, the team decides to bring her out of stasis despite the risk to her health. Everyone is shocked when, once re-animated, the elderly woman identifies herself as none other than Dr. Weir.
The Atlantis team travels to Dagan, a planet with a hidden ZPM and a mysterious trail that will lead to its hidden secret chamber location. But the Genii have learned of the Atlantis team's activities on Dagan. Realizing the ZPM must hold awesome power, the Genii plant a sleeper agent amongst the Daganians aiding the Atlantis team on their search. Now, as the Atlantis team closes in on the location of the ZPM, the Genii close in on them.
Having learned that the entire Wraith armada is headed towards the city, the Atlantis team prepares to send a data message to Earth with information about the Wraith threat, and what could be their last messages home to loved ones.As the rest of the team records their touching and often humourous messages back home, Major Sheppard and Teyla embark on a reconnaissance mission where they witness the vastness of the Wraith army, and look on helplessly as the Wraith cull the planet's helpless inhabitants.
Terrifying nightmares about the Wraith cause Teyla to lash out at her colleagues and prompt her to seek professional advice. With psychological guidance, she discovers that she can sense the Wraith. In their search to learn more, Teyla and the Atlantis team discover important information that may hold the key to understanding their enemy, including the disturbing possibility that Teyla's connection to the Wraith could be the result of genetic experimentation.
With the Wraith armada closing in on Atlantis, Dr. McKay and a small team attempt to repair an ancient weapons satellite in the hopes of leveling the odds in the coming battle. Meanwhile, tension builds between Teyla and some of the other members of the Atlantis team over her connection to the Wraith. Major Sheppard steps in to defend her, but even he begins to harbour doubts when a team member is left unconscious after an attack by an unknown assailant.
With the Wraith armada bearing down on the city, the Atlantis team prepares to evacuate. Setting the city's self-destruct sequence, they hope to make it impossible for the Wraith to gain access to Earth. Things begin to look up when reinforcements from Earth are brought in and it is announced that the battleship Daedalus will arrive in four days. However when the warheads are easily destroyed by the Wraith, and the first wave of Wraith attackers strafe the city with weapons fire, it becomes increasingly clear that the added reinforcements are not going to be enough. With time running out, the Atlantis team must turn to the least likely source of aid - the duplicitous Genii! But with the Wraith overrunning the city, even the Genii's help may not be enough.