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.

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.

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.

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…

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…

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.

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…

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…

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…

“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…

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…

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…

With a plan to potentially extinguish the Replicator threat, the Atlantis team must seek an alliance with a fleet of Wraith ships.

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…

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.

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…

An automated lockdown traps Atlantis personnel in various parts of the city, each of them hoping the others will come to their rescue.

Rodney McKay goes in search of his sister on Earth after she is kidnapped by the head of a powerful corporation.

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…

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…

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.

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.

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.

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.

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.

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…

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.

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.

Nearly a third of Atlantis’s residents are infected with a deadly virus that causes hallucinations and death, forcing a lockdown of the city.

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…

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.

With a brief opportunity to send a data transmission to Earth, members of the Atlantis expedition compose video messages home to their loved ones.

When a massive storm threatens the city, Atlantis is evacuated — only to be taken over by the team’s newest enemy.

The team finds themselves in mortal danger when their Puddle Jumper ship becomes lodged in the Stargate.

After a series of run-ins with the Wraith, the team begins to suspect their Athosian allies of having a spy in their midst.

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.

When Dr. McKay is trapped underwater in a sinking Puddle Jumper, his only chance for survival may be an hallucination of Samantha Carter.

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.

Michael and his Wraith faction arrive at Atlantis to propose an alliance, hoping to use the retrovirus to transform their Wraith enemies into prey.

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…